love to hear her voice again. i would love to hear her laugh. i tell people i won the kid lottery. and she was such a part of our lives, that i would talk to her at least every day. woman: she was a genuine person. she was super fun, like, that she lived to be with people and to just engage. and it was amazing. that's all for this edition of "dateline." i'm andrea canning. thank you for watching. [music playing] i'm awoman: vanessa was this is data good soldier.ork-tv. andrea canning: did she go into the army to help people? yes. woman: another soldier notified command that she was missing. woman: they're searching their company areas. they're searching the installation.

it's like she vanished into thin air. andrea canning: this takes a turn, this story. so her family said that she was being sexually harassed by a superior. this kicked off the hashtag #iamvanessaguillén. i don't know what makes them feel they have the right to harass my sister. women are coming forward saying they, too, were sexually harassed in the army. enough is enough. we need to change this. man: the trends are going the wrong way. that's really tearing at us as an institution. woman: a man who is out digging holes sees what he thinks is human hair. lupe guillen: i kept praying because miracles can happen. i would say, "please, don't let it be." hello, and welcome to "dateline." vanessa guillén was living her dream, serving in the military while keeping close

to her tight-knit family. then, she disappeared. as investigators searched for the missing soldier, her loved ones went public with an accusation that sparked a movement. their quest for answers would shine a spotlight on an ugly truth, but would it lead them to vanessa? here's "voices for vanessa. man: everywhere we go. woman: everywhere we go. woman: i couldn't believe this was happening to me. it was the scariest part in my life because i was alone. andrea canning: so many were quiet for so long. woman: i was harassed, sexually assaulted, raped, and physically threatened. woman: this man that i trusted. i felt violated. i felt stupid. andrea canning: but now? now, they want to be heard. woman: the men who sexually assaulted me are still serving in uniform today. woman: there's no excuse for harassment. it has to stop. andrea canning: all these voices inspired by one that suddenly went silent.

april 22, 2020 should have been an easy wednesday for private first class vanessa guillén. the 20-year-old was heading to her station at fort hood, since renamed fort cavazos, where she'd complete a few tasks her boss had texted her about the night before. even in this regimented army world, pfc guillén texted a lot with her boyfriend, her girlfriends, and according to her sister, lupe, vanessa constantly texted with their mother, gloria. my mom, like, texted her every other hour. like, what are you eating? are you ok? andrea canning: so it was strange when by midday, their mom stopped hearing from vanessa. that's when her sister, mayra, tried to reach her. mayra guillen: the call went straight to voicemail. and lunch time, i texted her. the message didn't send. i tried calling, again. it went to voicemail. that's when i started getting really scared. andrea canning: vanessa guillén's life story was a typically american one.

the daughter of immigrants, one of six children, she was a mix of many things-- ambition, generosity, humor. when no one was watching her, she was with her family. what was her personality like? lupe guillen: she was goofy. like, she just laughed to herself. so, like, her laugh just was contagious. andrea canning: according to her mother, gloria, even as a child, vanessa was laser focused. is it true, she wanted to be in the army as young as 10 years old? [non-english speech] andrea canning: by high school, it looked like vanessa would have plenty of options in life. she excelled in school. and her friend, ashley macias, said sports were her thing. ashley macias: running. working out. she was doing-- always exercising. was she the whole package in high school? yeah. she was friendly with everybody she encountered. andrea canning: as graduation neared,

vanessa told her family, she hadn't changed her mind. she still planned to enlist in the army. lupe guillen: she wanted to help others. and she wanted to have better opportunities. andrea canning: after basic training, vanessa was assigned to the third cavalry division at fort hood in killeen, texas. there, she specialized in small arms and artillery repair. things went well. vanessa made friends. received great feedback from her superiors. and on the weekends, she'd make the three-hour drive down to visit her family in houston. but a few months in, her family noticed a change. [non-english speech] andrea canning: gloria asked her daughter, what was wrong? [non-english speech] now, a year later, vanessa had gone off the family radar. as the day passed, her silence nagged at mayra. of course, vanessa could just be occupied with work.

still, it wasn't like vanessa to disappear. problem was, where to look for her? fort hood is one of the largest army installations in the world. andrea canning: jasmin caldwell reports on fort hood for nbc affiliate kcen-tv. it has about 214,000 acres. there's about 65,000 soldiers roughly. so it's a very, very large place. andrea canning: mayra agonized. the place was so large, her sister could easily be forgotten. and she didn't like what she was hearing when she said she spoke with one of vanessa's staff sergeants. mayra guillen: he just wasn't able to tell me anything. and that just made me even more upset. andrea canning: too upset to sit home and wait. you headed to fort hood? so you needed answers. right. andrea canning: mayra says she was surprised by the reception she got at the gate. what did they tell you? they tried to ask me if i knew anything.

i'm like, if i knew anything, i wouldn't be standing here. so this is a mystery, what happened to your sister. no one knows anything? everyone claims that they just didn't know. andrea canning: army investigators did tell the family one terrifying thing. mayra guillen: everything was there-- her car, her keys, credit, debit card, id itself, her military id. and she would never leave without it. that is extremely bizarre that she's gone, but all these critical items that, of course, any soldier would have, especially the id, is there. what did that tell you? something really bad happened to her. how does she just disappear? exactly. andrea canning: coming up, how does someone just disappear from a military base? my first thought, she must have went awol.

andrea canning: then, the last images of vanessa before she went missing. picking up food at a local restaurant. woman: the owner says, she seemed like she was worried about something. andrea canning: when "dateline" continues. (♪♪) ♪ (slow down) ♪ (♪♪) cut!!!! i get it! slow motion. slow down geographic atrophy. but we don't need gimmicks. stick to the facts. ga, the advanced form of dry amd, can irreversibly damage your vision. but syfovre is an fda-approved eye injection that gives you the power to slow ga. syfovre was proven to slow ga lesion growth over 2 years with increasing effect over time. it's the only treatment to slow ga in as few as 6 doses per year. don't take syfovre if you have an infection, or active swelling in or around your eye that may include pain and redness or are allergic to it.

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at first, jasmin caldwell of nbc affiliate, kcen tv, didn't pay much attention to it. it happens often. my first thought, she must have went awol, you know, just swept it under the rug. but then, you know, the next day, it-- you know, it just-- it wouldn't go away. you know, you're kind of like, well, let's look into this. vanessa's family and friends are determined to find her. andrea canning (voiceover): what caught jasmin's eye right away was the determination of vanessa's family. you didn't leave the area. you stayed. i told my mom, i'm not going to leave until i know something, or until i find her. i know she's going to be with us soon. i can feel it. andrea canning (voiceover): by now, fort hood had dispatched soldiers to search for vanessa. local, state, and federal law enforcement helped, but as the number of days without vanessa grew, her family wondered if the search lacked urgency. so they kept pressure on investigators and searchers, even looking for her themselves. it's a matter of time before somebody, you know,

actually confesses something, or we find a way to find her ourselves. researching anywhere. we were, like, keep printing posters, putting it everywhere, contacting people like "dateline." andrea canning (voiceover): "dateline" posted a missing in america article about vanessa, reaching hundreds of thousands of people online. the family didn't let up, but they say the army wasn't much help, that they got very little information from fort hood. they tried to, like-- we can't help y'all anymore, because there's no information. there's no tips going on, but, like, that's your job. do your job. andrea canning (voiceover): the family said their conversations at fort hood disturbed them. they felt ignored, that the army wasn't sharing enough details, and that the search was still moving too slowly. [chanting in spanish] lupe guillen: we started protesting in the east gate right there, telling them that we're not going to leave. we're going to stay here until we find vanessa.

andrea canning (voiceover): even with weekly rallies, local tv coverage, and intensified searches, there was no sign of vanessa. andrea canning: a reward was posted. hundreds of people were searching. but weeks had gone by and nothing. i still had faith. i had faith that we were going to find her. hi, jasmin. andrea canning (voiceover): then jasmin caldwell found what she thought was a clue. well, hey, chris. the owner of taqueria mexico restaurant here in killeen gave me surveillance footage. andrea canning (voiceover): it was video of vanessa from a week before she went missing. jasmin caldwell: you can see her getting out of her white jeep and going to get food inside taqueria mexico. andrea canning (voiceover): the last images of vanessa before she disappeared. jasmin caldwell: the owner, jaime moreno, says he knew her well, and says the last time he saw guillen, she didn't seem like her normal cheerful self. in fact, he says she seemed like she was worried about something. andrea canning (voiceover): our partner network,

telemundo, went with gloria to the restaurant as she tried to find out what she could. andrea canning (voiceover): for weeks, the family had been trying anything, everything, to find vanessa, including a big push on social media. we started the facebook page, find vanessa guillen. andrea canning (voiceover): their facebook page was exploding. every day, we used to get, like, 10,000 followers, 10,000 likes. andrea canning (voiceover): and now jasmin's station had company. it's getting national attention, so it was just we lived-- like, we eat, sleep, and breathe vanessa guillen. it was getting traction. we kept pressure as a family because we wanted answers. this just shows how much people actually do care, and we're not in the fight alone. andrea canning (voiceover): meanwhile, lupe began reading up on fort hood. she discovered a series of investigations into problems there. lupe guillen: it was like my sister's not the only one missing. andrea canning: from-- fort hood army base. from fort hood.

then i read two masked shootings. not only one, but various prostitution rings, gang members, drug use, violence. i was like, what's happening in fort hood? andrea canning (voiceover): in addition, fort hood has some of the highest murder, sexual harassment, and sexual assault rates in the us army. knowing that only made the family doubt the army officials more. nearly two months after vanessa disappeared, her family took a dramatic step. vanessa's mother said vanessa told her a secret. she said she had been sexually harassed by a superior. the family went public on telemundo. [speaking spanish] andrea canning (voiceover): vanessa's family was certain her disappearance was connected to sexual harassment.

i don't know what makes them think they have the right to harass my sister! where is vanessa? andrea canning (voiceover): they demanded investigators get to the bottom of it. they all have a grandma, a sister, a mother, a daughter. would you like them to be sexually harassed? no! andrea canning (voiceover): they revealed vanessa's secret in hopes of solving a mystery. say her name! vanessa guillen! say her name! andrea canning (voiceover): what they didn't realize was that they just started a movement. say her name! vanessa guillen! one family's tragedy unites a sea of strangers, and more secrets spill out. andrea canning (voiceover): coming up, outrage and then an outpouring. this kicked off the hashtag, #iamvanessaguillen. the stories these women were posting, it was just flooding social media channels. andrea canning (voiceover): stories of what some call the man's world of the military. i told him that hey, you really need to cut that out. and he said, why? what are you going to do about it?

and in my mind, i realized, i'm not going to do anything about it. that was the lowest point for me. andrea canning (voiceover): when "dateline" continues. their plugs fell out and their power ran out. >> that's why. >> we invented the. >> snug plug. >> the fast and easy way to make sure your. >> plug stays in. >> look, it's not that your plug is bad, it's that your outlet is loose. not only is it frustrating, but it can damage devices cause electrical shorts or worse. but snug plug keeps your gamer gaming and your computer computing. your alarm clock will always wake you up and your phone will stay charged up. the secret is snug plugs patented ul rated polymer that's designed to push in and stay in. now go from loose outlet to secure snug. fit for work, for home, for travel. if it plugs in snug plug keeps it in. look in

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she was being sexually harassed, that news, i remember reading it and thinking, this is something bigger than just a missing soldier. andrea canning (voiceover): haley britzky reports on the army for "task & purpose," a magazine that covers the military. we started hearing a lot of noise. a lot of people were not happy. and this message was really getting out, with vanessa's name at the center of it. this kicked off the hashtag, #iamvanessaguillen. and the stories these women were posting, it was just flooding social media channels. andrea canning (voiceover): these are the voices of active service members and veterans who posted harrowing accounts of sexual harassment and assault they said they endured while serving their country. woman 4: a leader sexually assaulted me. and i didn't say anything because i was warned that nothing would happen, and my career would end. woman 5: i was absolutely sexually harassed quite a bit during my time in the navy. woman 6: i've gone through so many therapy sessions and medications. woman 7: he got a slap on the wrist.

the day i heard this news was the day that i lost faith in the military. woman 8: i was harassed verbally and sexually. and everyone's answer to women being harassed was that you could never do anything about it. andrea canning (voiceover): melissa bryant says sexual harassment was common throughout her military career. the former army captain works as an advocate for veterans. sometimes it was slick and then sometimes it was just so egregiously disgusting that i would just laugh it off. andrea canning (voiceover): she says she's proud of her service, but suffered verbal sexual harassment throughout her time in the army. i usually got comments about my breasts a lot. - really? - oh, yes. yes, a lot. like the-- yeah, like, how do you manage to do push ups with those? ugh, and were any of the comments hitting on you? oh, yes, and then they'd say, oh, no offense, ma'am. you know, you're just one of the good-looking ones. andrea canning (voiceover): melissa says she had to be careful how she reacted, especially with superiors. andrea canning: what if it was your superior making an inappropriate comment, and let's say you did snap back,

what would happen? there would definitely probably be a reprimand at that point. there is a very real fear of retaliation. andrea canning (voiceover): but it wasn't just her superiors. i was in company command, and i had a soldier make comments toward me. i told him, hey, you really need to cut that out. and he said, why? what are you going to do about it? and in my mind, i realized i'm not going to do anything about it. that was the lowest point for me. yeah, when you have that realization that he's right, i'm not going to do it, that's a horrible realization. it was a horrible realization. this is someone who's reporting to me who's essentially taking away my authority and my agency as a woman and also as an officer, and saying you're not going to do anything about it. andrea canning (voiceover): for bryant, the message was clear. taking on harassers could damage her career. is it fair to say the military is

still mostly a man's world? it very much so is. it's changing, but it's still very much a male dominated world. andrea canning (voiceover): and while the military has set up programs like sharp, the army's sexual harassment and abuse response program, reports of sexual harassment still rose by 10% between 2018 and 2019. higher numbers can partly be attributed to some service members feeling more comfortable reporting harassment and abuse. where is vanessa? we want answers! andrea canning (voiceover): as vanessa's disappearance turned into a cause, her family brought on board a firebrand attorney named natalie khawam to get to the bottom of their claims vanessa was sexually harassed. natalie khawam: she said, how much are you going to charge us? and i said, i'm not going to charge you anything. you lost your sister. i want to help you out. andrea canning (voiceover): but khawam says the army was reluctant to share details on the case with her, too. is it possible that they were doing all this investigation, but they were just really holding it because that's how they operate, and they aren't going to share critical details

in an investigation? with a missing person case, you share information with the family. and the reason i feel like they didn't want to share information with us is because they didn't want being critiqued. they didn't want to be questioned. andrea canning (voiceover): major general donna martin commanded the army's criminal investigation division, the cid, which investigated vanessa's disappearance. i think there's a misperception out there by many that because we watch all of these crime shows on tv, that they unfold that easily, and that dna turns around, and that evidence just turns up. and it doesn't happen like that in real life. how important was this investigation to you? andrea canning (voiceover): she says behind the scenes, the investigation was much more intense than anyone realized. she'll take us inside it next. coming up. they're searching their company areas. they're searching the installation. they're looking everywhere for vanessa. andrea canning (voiceover): on base,

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vatican says the pope suffered a. severe asthmatic respiratory crisis saturday. it required high flow oxygen therapy, but he remains alert and hamas released six hostages in the final exchange. >> of phase one of the israel-hamas. >> ceasefire, while over 600 palestinian detainees were supposed to be freed. israel delayed the release. >> stating it will be postponed. >> until the next hostage release is guaranteed. for now, release is guaranteed. for now, back to dateli welcome back to "dateline." i'm andrea canning.

vanessa guillen's family said she was sexually harassed before vanishing from her army base. their claim inspired other service members to share similar stories on social media. meanwhile, vanessa's loved ones worried that the missing person case was going nowhere. but it turns out, a breakthrough was just around the corner. continuing now with "voices for vanessa." where is vanessa? i want my sister back, and i want her alive! we need answers! andrea canning (voiceover): vanessa guillen's family and her supporters were convinced the army had been negligent in its response to her disappearance. this investigation was absolutely the number one priority. andrea canning (voiceover): general donna martin says the army was doing everything possible to find vanessa, and a lot of soldiers were helping. over 500 soldiers turn out at this point. they're searching their company areas. they're searching the installation. they're looking everywhere for vanessa. andrea canning (voiceover): and in the weeks that followed, she says her investigators

chased down every lead. we conducted over 300 interviews with members from the unit and from soldiers from fort hood. andrea canning (voiceover): she says investigators started by narrowing down a timeline of vanessa's day, where she was, and who she was with. donna martin: every person who had an encounter with vanessa that day was a person of interest to us. andrea canning (voiceover): vanessa's first encounter was at 10:00 am in a weapons storage and repair room, known as an arms room. she left personal items there with a soldier whose rank was specialist. so we learned that specialists had spent some time with her, and actually, because she had left those items in the first arms room, had an expectation that she would return. andrea canning (voiceover): investigators learned that when vanessa left that room, she walked 75 yards to a second arms room. she met another specialist there sometime after 10:20. donna martin: the specialist told us

that vanessa had arrived at his arms room and that she had conducted her task, and then she left. was there any reason to suspect that he had done anything wrong? no. andrea canning (voiceover): in fact, vanessa texted her platoon leader she'd completed her tasks in the second arms room, and three eyewitnesses smoking under a tree said they saw vanessa at 11:15. those soldiers told us in an interview that they saw vanessa move towards the parking lot. and so because we knew her car was in the parking lot, we absolutely searched her car. was anything found in the car? no. andrea canning (voiceover): investigators would end up bringing in a forensics unit to look for evidence. any blood evidence? any smell of cleaning supplies that would suggest that something had happened in one of those rooms? there are no signs of blood in the arms room. no signs of a struggle? none. it's like she vanished into thin air. almost.

did you see anything in her personal life, any red flags? none at all. this is a responsible soldier. yes, absolutely, no information that would suggest she would walk away of her own volition. andrea canning (voiceover): weeks went by. then the case shifted focus when investigators learned the soldiers who thought they'd seen vanessa at 11:15 had been mistaken. they'd really seen her an hour earlier, around the time she'd met with the two soldiers in the arms rooms. andrea canning: did either of these soldiers have any reason to kill vanessa that you could gather? we have no information that will lead us that either of these soldiers had a reason to kill vanessa. andrea canning (voiceover): even so, the specialist vanessa was with in the second arms room could have been the last person to see her alive. his name was aaron robinson, a 20-year-old combat engineer. andrea canning: what was robinson's alibi that day? specialist robinson tells us that once he had met with vanessa, that he pretty

much was done for the day. and so he actually locked the arms room, and he left for the day. andrea canning (voiceover): robinson's personal id was entered into the security system, indicating he'd left the arms room when he said he did. andrea canning: did he go home? that was his story. he told us he was home for the rest of the evening. and who was he with? cecily aguilar. andrea canning (voiceover): cecily aguilar was robinson's 22-year-old girlfriend, a civilian estranged from her husband. aguilar worked at a local gas station, but had a side business on social media posting racy pictures of herself for quick cash. just to be held. andrea canning (voiceover): reporter jasmin caldwell learned from court records that aguilar told investigators pretty much the same story as robinson's. well, the night of april 22, she was at her home with aaron robinson, didn't know anything about the disappearance of vanessa guillen. andrea canning (voiceover): but that wasn't adding up for investigators. in court documents, they laid out an entire scenario of vanessa's disappearance

using cell phone analysis. military reporter haley britzky says the documents reveal the night vanessa went missing, there were multiple calls between aguilar and robinson. that seemed odd because they both said they were together all night at home. and the phones were both there, his and hers. right, yes. andrea canning (voiceover): aguilar told investigators she could explain those calls. the reason he'd called her multiple times is because she couldn't find her phone, and he was helping her find it. investigators knew that wasn't quite the full story because the calls were longer than you would expect for someone just quickly calling to help you find your cell phone. andrea canning (voiceover): in a later interview, they confronted cecily aguilar with location data that placed her phone about 20 miles from her home near a river. haley britzky: while, at first, she did confirm the story that she had been at home the entire night, she later backtracked and said they had taken a drive to de-stress to look at the stars. andrea canning (voiceover): if cecily aguilar's story seemed shaky to investigators, they became even more suspicious

when search teams arrived at the river and made a disturbing discovery. so they found what they described as a burn site. andrea canning (voiceover): among the scorched trees were remnants of a big burned out plastic box called a tough box. investigators had stumbled upon a huge clue. weeks earlier, two witnesses had seen robinson wheeling a tough box out of the arms room the day vanessa went missing. but what did it mean, and was it enough to arrest him? in a case like this, you really have to dot your i's and cross your t's. that's exactly right. and that burned tough box, in and of itself, was not a real connection to specialist robinson at this point. andrea canning (voiceover): investigators feared the worst, but they still couldn't prove anything. they had no evidence robinson had harmed vanessa. but nine days later, everything changed. coming up, miles from the base, a heart

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even more sinister. reporter: investigators have found partial human remains about 25 miles southeast of fort hood. most of the investigative work has been happening just back that way, beyond that tree line. andrea canning (voiceover): it was 69 days after vanessa disappeared. a man who is out digging holes in this area hits cement. and when he hits cement, he sees what he thinks is human hair. that is such a disturbing discovery. just tragic. so cid calls you and tells you what? that they've discovered human remains. do you, in your heart, believe it's vanessa? i did. and i kept praying. i was like, please, god. because miracles can happen, i would say, please, don't let it be. andrea canning (voiceover): an investigator later confirmed the worst with a single detail. he told me about her hair. how did he describe it? well, her long black hair.

so you're the first in your family to learn this. how do you share the news with everyone else? i couldn't tell them. the body of vanessa guillen, the missing fort hood soldier, has been discovered. going to. give me conmigo going to. give me conmigo porque. llego la casa de flores andrea canning (voiceover): but she was dead. at just 20 years old, vanessa guillen had been murdered. vanessa was one of us. it was heartbreaking for all of us. andrea canning (voiceover): hours after vanessa's body was discovered, cecily aguilar was called in again for questioning, and her story went to pieces. the moment this all really wrapped together

is when cecily aguilar, robinson's girlfriend, confesses all of this to authorities. andrea canning (voiceover): aguilar told them her involvement began hours after vanessa went missing. according to a criminal complaint, that nighttime trip she said she'd made with robinson to de-stress and gaze at the stars was just another lie. haley britzky: aguilar told investigators that robinson picked her up from work and went out with him to the river. she tells them that robinson told her that he killed a female soldier, and that he put her in a box and drove her out to the river. andrea canning (voiceover): aguilar said robinson led her to the box. haley britzky: when he opened it, she saw vanessa guillen inside of it. and she told investigators that they then went forward to dispose of the body. they tried to burn her body, but it wasn't burning completely, and that's when they buried her remains into three separate graves in the area. andrea canning (voiceover): as for the murder itself,

investigators say it happened on april 22 in the arms room where robinson worked, where there were no security cameras. andrea canning: did cecily say how he had killed her? she told authorities that robinson told her he'd hit her several times in the head with a hammer. it must just tear you apart when you think about her in that room. yes, taking a human's life that way. it's disgusting. i hate to think of it because i can just feel, more or less, the panic that she was in. andrea canning (voiceover): vanessa's sisters find comfort in the heartfelt murals honoring vanessa and can only imagine why she was killed. i felt that he sexually assaulted her in that arms room. andrea canning (voiceover): they believe he then silenced vanessa by killing her. no one was there to help her. no one was there to take care of her. andrea canning (voiceover): cecily aguilar's interview

was enough to finally take robinson into custody, but there was a problem. even though robinson had been confined to the barracks due to covid rules and was placed under observation as a suspect in the investigation, he was not under armed guard, so he made his move. robinson got out of the barracks and left the base. andrea canning (voiceover): investigators called on cecily aguilar to help. andrea canning: you're with aguilar. yes. and she is reaching out to robinson. yes. this is trying to-- donna martin: to get him-- come out of hiding or-- that's correct. andrea canning (voiceover): investigators told aguilar to call robinson, and they listened in as the couple discussed vanessa's death. he did not deny anything. andrea canning (voiceover): and soon after, maybe feeling the walls closing in, robinson texted aguilar links to news reports about vanessa's remains being found earlier that day. he began sort of mentioning these news articles that were covering that some human remains had been found, although they hadn't been identified

yet as vanessa guillen's. and in a phone call, he told aguilar, baby, they found pieces. they found pieces. andrea canning (voiceover): by "pieces," investigators were convinced robinson meant the remains of vanessa found by the river. they had the evidence they needed, and they had a fix on robinson's phone. they moved in to arrest him, but they wouldn't get the chance. coming up, after vanessa's story and all the others, some tough questions for the army. would you say there's a problem with sexual harassment, sexual assault in the military? the trends are going the wrong way, and that's really tearing at us as an institution. andrea canning (voiceover): but what will they do about it? it needs to be a complete enforcement. and you police our own. what do you say to women when they ask your advice if they should go into the army? right now, i don't know that i could tell my own daughter to go into the military. andrea canning (voiceover): when "dateline" continues.

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>> that's one (800) 403-7539. andrea canning: army investigators were sure aaron robinson murdered vanessa guillen. and now they were closing in on him. officer: he's actually seen by an off-duty police officer, and they radioed to the local police department. andrea canning: when the officer moved in on robinson, he started to run. and the officer gave chase.

officer: then there's this confrontation. and when he goes to apprehend him, robinson takes a gun and shoots himself. andrea canning: right there in the street, robinson was suddenly dead. what's it like for you when you get that call that our prime suspect has just killed himself? i mean, a dramatic conclusion. it is. it means that maybe we'll never find out why he killed vanessa. it's so open. and it doesn't give us any closure. and it certainly doesn't give the family any closure because they don't know why. andrea canning: so robinson never had to face a judge. but cecily aguilar did. woman: she's barbaric. there's not another word for a savage that does that to a human being. andrea canning: she was arrested and later pleaded guilty to four felony charges, including accessory after the fact. she was sentenced to 30 years. meanwhile, vanessa's story became so big, her family was invited to the white house in july 2020.

we need a change, and we need a positive change. andrea canning: president trump told them he would look into vanessa's case, quote, "very powerfully." so we're going to get to the bottom of it. this is a wake-up call. and it has captivated the attention of the entire army leadership. andrea canning: ryan mccarthy was secretary of the army at the time and is a former army ranger with combat experience in afghanistan. i was a soldier, and i'm a father of a daughter. and i can't begin to understand the pain that the guillens are under. i have to look at this, and fix, this and stem these tides. what would you say to the guillen family right now if they're watching? i'm heartbroken. i'm sorry. i'm disappointed. and to know that we're going to do everything we can to make the changes necessary so things like this never happen again. andrea canning: investigators believe robinson cleaned the crime scene in less than 45 minutes. but army forensics experts only conducted tests in the arms room two months later, after vanessa's remains were found

and after robinson had killed himself. there's been some criticism that you had a pretty clear idea that specialist robinson was the killer, and you let him get away. looking at how law enforcement comes forward to put a warrant on an individual takes a lot of facts. it's very challenging of how they come to that conclusion. i think people look at it and say, this is the army, and they couldn't keep an eye on him? that's something that has to be looked at. andrea canning: we asked if the then-secretary had looked at the army's communication with vanessa's family. they say that they were treated with disrespect, that this was a botched investigation. there are a lot of things that we can and can't say due to the nature of where you are in the investigations. that creates frustration with the families. and yet they still feel this way. where do you think the breakdown was? they're upset, andrea. i mean, they're upset. they want answers. we will continue to be very frequent in our communications every time we have the information, having them among the first to know.

but this family is grieving. andrea canning: a big part of the family's grief was their belief that vanessa had been sexually harassed. do you think sexual harassment played a role in any way in vanessa's murder? there is no evidence to suggest that vanessa guillen was sexually harassed by specialist robinson. andrea canning: but while her family said vanessa didn't report being sexually harassed, secretary mccarthy said her higher-ups were aware vanessa was having a problem. allegations were brought forward to her chain of command about her being sexually harassed. by a superior? we'll get into the specifics when we're able to talk more in the future. in april 2021, an army investigation found that vanessa guillen spoke to her chain of command twice about being sexually harassed by a superior and that no formal action was taken. investigators found no evidence that aaron robinson harassed vanessa. but they determined he had harassed a different female soldier in 2019.

the report also concluded that aaron's escape while being detained after the discovery of vanessa's remains was the result of poor communication and other lapses by army personnel. the army has disciplined 19 soldiers and officers in connection with vanessa guillen's case. two others were disciplined in relation to the permissive culture found to exist at fort hood. a department of defense report says that in 2018, over 24% of active duty women had been sexually harassed and over 6% of active duty men. would you say there's a problem with sexual harassment, sexual assault in the military? the trends are going the wrong way. the numbers are very high. that's really tearing at us as an institution. how do you change that culture? army senior leaders sitting down with their subordinates and just saying that that type of behavior is intolerable. we don't accept that in our ranks. and if it continues, we're going to hold people accountable. andrea canning: former army captain melissa bryant says

words need to become actions. it needs to be a complete enforcement. and you police our own. what do you say to women when they ask your advice if they should go into the army? right now, i don't know that i could tell my own daughter to go into the military. i'm not sure that my father would tell me now to go into the military. and my father was a vietnam veteran, served 27 years. andrea canning: fort hood seems to epitomize the army's deeply entrenched and long-term problems. in november 2020, an independent review of fort hood by outside experts found a toxic culture, permissive of sexual harassment and assault at the army base. we have a problem. we've got to recognize we have a problem, and we've got to fix it. it pains me that it took the death of your daughter-- andrea canning: california congresswoman jackie speier, chair of the house armed services subcommittee on military personnel, has been trying to pull the military into line for about a decade. the military brass would come to us and say, we have zero tolerance for sexual assault

and sexual harassment, and they were given a pass. not anymore. andrea canning: she says in a 2019 military survey, 120,000 service members said they'd been sexually harassed. but less than 1% filed a complaint. and when it comes to sexual assault, of the 20-plus thousand cases, only about 1% resulted in convictions. we are introducing the i am vanessa guillen legislation today. andrea canning: so she's introduced legislation with strong bipartisan support, the vanessa guillen act, that requires sexual harassment and assault complaints be investigated by an independent military prosecutor. --law in the us army. why will things be different this time around? this legislation creates accountability. there will be independent investigations taking place. and i'm going to guarantee that that kind of action is taken by the military by making sure this legislation gets passed. andrea canning: representative speier's hard work paid off when a key part of the i am vanessa guillen act

was signed into law. legal decisions in military sexual assault cases have now shifted from commanders to independent prosecutors. also enacted, a provision establishing sexual harassment as a standalone offense under military law. would you say that this is the #metoo movement of the military? i think there's no question that this is the #metoo movement of the military. vanessa will go down in history in saving so many other service members' lives. andrea canning: in august 2020, vanessa's casket was taken by horse-drawn carriage to a memorial service at her former high school. her family chose a private burial, though a military funeral was an option. we actually declined. my mom didn't want the military casket or anything of that. because of how the military handled this? right. [speaking spanish]

andrea canning: vanessa's family hopes her legacy will be about bringing change to the army, giving a voice to so many men and women who have suffered in silence. gloria guillen: [speaking spanish] that's all for this edition of "dateline." i'm andrea canning. thank you for watching. >> good morning. >> and welcome to this. >> sunday edition of. morning joe. weekend. >> it was. >> another fast. >> moving newsweek. >> here are some. >> of