children. that's when the neurons connect. and the children whose brains are exercised in those years end up with stronger brains -- much stronger brains. and the children who do not get brain exercise in those years end up not being able to read. they end up having difficulty in school, dropping out of school, and what's amazing is -- you can have a pretty good sense, by age 3, which path each child is on. and you can do remedial things after that, but the first three years are the big opportunity. >> more than 80% of a baby's brain is already developed by the time they're 3. and by the time they're 5, 90% of their brain is developed. so you want to get as much of that linguistic engagement happening from the very beginning. >> tell me about it here in this community. >> [ laughs ] >> in alameda county, first 5 initiatives created the neighborhood partnership project, providing critical

developmental screening in family-centered school-readiness programs. >> it is such a joy to see families with strollers and little kids being able to walk into their playgrounds and their libraries and these public spaces -- families who may not have the resources to send their children to preschool. and when you walk into that room and see the kids playing and seeing the parents interacting with their kids, you just know that you're helping their relationship. and that's creating the foundation for a whole lifetime of good things for those children. >> ♪...bitsy spider went... >> some of the unique benefits that come from here is -- the children get to come with parents, so the other part is that we're educating the parents. so they come for three hours, so it gives us an opportunity to educate parents on healthy snacks or on different ways to try things at home that they might not necessarily try. and it's a more comfort level, where you're here with the instructor...

>> ¿dónde están los morados? where's the purple? >> i really like it that he's here, because this is when we actually play together, when we interact together, and when i make time for him to play. and i know play is very important for his age. you know, play is like learning. and so, this program, it's a great program for me especially because i don't have to pay for it. >> not only are we helping with early-childhood education, but we're also creating a community where parents feel comfortable that they can ask another mom, "hey, do you know about this activity?" or, "do you know about this?" and so they definitely develop that community, that support group, so that, when their child does go to school, they have people to fall back on. >> incorporate your opposite hand, so your left hand should be the full circle. >> in san francisco, the support for families agency uses first 5 funding supporting new

moms hoping to bond with their babies, along with children with special needs. >> very often, families and professionals in special-ed world are actually coming up against each other because families are trying to fight for services, and professionals are often the gatekeeper for those services. and providing workshops where families and providers can hear the same topic and ask the same questions often helps to bring them to the table. >> research has also shown that unidentified special learning needs and untreated special learning needs offer a significant barrier to kindergarten-readiness and school success. and, oftentimes, these concerns go unidentified, and this can delay connection to really critical services, can add additional stress, and can put families at risk of being additionally overwhelmed.

and, so, early identification means that we're identifying these concerns at the earliest point possible and, as soon as we can, linking up to needed services. and this can dramatically increase positive outcomes for children and pave the way for their success in and out of school. first 5 san francisco funds 25 family resource centers. one of those is the special-population family resource center for children and families with children who have special needs. we fund universal preschool programs, and within those programs, we incorporate developmental screenings in all of our services. >> good job! >> there's always an opportunity to talk and engage, and it doesn't cost a lot of money. you don't have to buy cds and videos. it's that your baby needs you, and hearing your voice and your being their first teacher is just so critically important. ♪ >> there's so much to explore here in the bay area, so we'll be back with more stories to

share. in the meantime, we want to hear from you, so send us your favorite stories, videos, pictures, and places in the bay area. visit us online, join us on facebook, and follow us on twitter. all of this fun driven by your northern california honda dealer. for more information on the vehicle featured in this episode, visit norcalhondadealers.com. ♪ the energy conscious whopeople among usle? say small actions can add up to something... humongous. a little thing here. a little thing there. starts to feel like a badge maybe millions can wear. who are all these caretakers, advocates too? turns out, it's californians it's me and it's you.

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>> reporter: seal it off. >> don't let that threat or that person, in this case paddock, get outside the 32nd floor, so that might have been what they were thinking. come to the 31st floor, and come up with their plan on how they were gonna come up to the 32nd floor. >> reporter: finally, one the most troubling questions. why did it take nearly an hour for police to breach paddock's door? which could have been plenty of time for him to perpetrate further violence. >> breach, breach, breach. >> the reason that you wait is because the imminent threat has either stopped or temporarily stopped. he's not firin' anymore. >> so at that point they were probably assembling more resources, get the right tactical gear, get the explosive entry equipment. we still don't know why paddock stopped firing, but for the

first time, we hear what may be the shots that ended his life. >> we received another video that films that 12th burst of fire, but also what appears to be two single rounds of fire, about a minute afterwards. >> was he taking one last shot at the door or outside, aiming at somebody and then saying, "now it's my turn." >> reporter: perhaps one day it'll all make sense to russell bleck and the other survivors. >> then i can hopefully get some rest. >> reporter: the experience has marked him for life and while there's plenty of sorrow, there's also strength. >> it's a constant reminder, you know? i'm never forgetting what happened that day. >> reporter: when we come back, a new widow with her own burning question. could the hotel have prevented the shooting? i love you, couch.

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"20/20's" mystery in las vegas continues. once again here's matt gutman. >> i have dreams every night that i know sonny has passed, but he doesn't, and so he keeps showing up everywhere and i keep hoping that he doesn't realize that he actually has passed away so that he stays. >> reporter: heather melton, an orthopedic surgeon and sonny, a

surgical nurse, were a love story that burned brightly from the moment they met. >> we were always holding hands anywhere we walked. when we fell asleep at night, we were holding hands. >> reporter: to celebrate their one-year anniversary, the couple decided to leave their home in big sandy, tennessee to attend the route 91 harvest festival in las vegas. ♪ when gunfire erupted, sonny immediately wrapped his arms around his wife to protect her. >> i felt the impact of the bullet in his body, 'cause he was holding me. and then we both went down at the same time. i just saw a lot of blood. you know, it's like how can this be real? >> reporter: but nearly a month later, reality is starting to settle in. heather, still coming to grips

with going it alone, is haunted by questions. >> the question troubles me the most is how did this man get that arsenal into the hotel room and nobody noticed. >> reporter: the hotel, the mandalay bay, is owned by mgm resorts international. when it comes to players in las vegas, mgm is a goliath, the largest employer and taxpayer in nevada. in addition to the mandalay bay, the company owns 12 he in this town including the bellagio, mgm grand, the mirage and monte carlo. >> how big of a player is mgm in las vegas? >> oh, the biggest. the biggest. the biggest gaming company in the world. if you were to call this a company town, mgm would be in charge of the -- they'd be the sheriff of the company town. >> reporter: but now the gambling behemoth is facing lawsuits including one alleging the wrongful death of 28-year-old andrea castilla, who was shot in the head and killed

during the attack. >> andrea was there to celebrate her birthday. her boyfriend was planning on proposing to her. >> reporter: attorney richard bridgford filed the suit alleging negligence on mgm's part failing to maintain the mandalay bay premises in a reasonably safe condition. >> the reality is that if these weapons are never transported into the hotel, i don't care how nuts paddock is, nobody gets killed. if they don't have breakable glass on the windows, nobody fires from the 32nd floor. if he isn't left undisturbed with his cache of weapons, this doesn't happen. >> reporter: mgm has declined to comment on the lawsuit. >> paddock picked this hotel because he had vip status. >> reporter: a vip in vegas can come with all sorts of perks. >> he knew he could move across with access to the service elevator.

where it would be much more discreet. he could run up, you know, place magazines, et cetera, ammo in his car. bring it up the service elevator. it raises no red flags. where the rest of us we do that, they question why do you want to move? there would be a lot of questions. >> reporter: remember those time lines. >> good afternoon. >> reporter: whatever version of events is ultimately presented in court could determine if mgm is held legally liable. >> the timeline is critical. every minute, every 15 seconds could mean the difference in could mean the difference in tens of millions, if not, more dollars. >> reporter: the security officer was shot about the same that hasn't stopped questions from swirling about those initial inconsistencies. almost two weeks after the shooting, someone who could possibly offer some clarity, jesus campos, decided to tell

his story. >> he had multiple opportunities to tell his story. >> reporter: this is the security police fire professionals union. he was called in to help prepare campos for those interviews. >> he chose five he was going to do and looking forward to those. >> reporter: just before he was about to go live on the national news shows campos changed his mind. >> we had a meeting and somewhere during that process, that meeting, mr. campos and others left the room and the last word we had was they were transporting him to a quick care facility. >> reporter: after that campos seemed to vanish. >> the mandalay bay security guard shot during the las vegas massacre has mysteriously vanished. >> he was scheduled to talk to all the national networks last week. >> campos' silence has fueled much speculation about why he has not spoken publicly.

>> thank you both for being here. >> reporter: 17 days after the shooting campos along with another hotel employee appeared on "the ellen degeneres show." >> as i was walking down, i heard rapid fire. and at first i took cover. i felt a burning sensation. >> reporter: campos told his story, but degeneres never asked him exactly when he was shot, before or after paddock opened fire on the crowd. >> you just want this to be over, so you're talking about it now and then you're not going to talk about it again? >> reporter: campos' union rep says he has no idea how this interview came about. >> the ellen show wasn't the venue we would have chosen and that campos and myself involved had actually lined up. >> reporter: so why would campos choose to sit down with someone known for more her jokes than her hard-hitting questions? could it have something to do with mgm.

>> there are slot machines and casinos across the country now, and you can find them on the las vegas. >> reporter: it was his client who chose to appear on ellen and no outside constraints on his interview. and tonight, nearly a month after being shot, campos still cannot go home. he is now being put up at an undisclosed mgm property for what his lawyer says is his own protection. >> this is the vaguest version of the witness protection program but it's their witness they're protecting. it seems they want to make sure he isn't out there talking about the very sensitive timeline. you can understand why it might be a very good investment for them to have him squirreled away. >> reporter: for heather melton, the answers, whatever they turn out to be, will do little to ease her pain. >> it will never make sense to me.

there is no justification for what happened, and it's just so senseless that i don't think you can ever get resolution in your mind. >> reporter: coming up, the man behind the massacre. what drove stephen paddock to carry out his deadly plot? >> somebody knows something and the plot thickens. somesend you and your family overwhelrunning. y can... introducing febreze one for fabric and air. no aerosols. no dyes. no heavy perfumes. it cleans away odors for a pure light freshness... so you can spray and stay. febreze one, breathe happy.

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"20/20's" mystery in las vegas continues. here's brian ross. >> i can't sit and dwell because that's when it starts to kick in. the fear or of it maybe happening again. >> reporter: michael greenfield was working as a stage hand that night. >> that sound just keeps ringing in my head. it's like a cd on loop. you keep hearing that sound over, and over again. it's hard to go away.

i don't want to say i have ptsd, or anything, but there's a part of me that it feels like i didn't do enough. that gets me the most. >> reporter: he may look big and tough, but the 37-year-old greenfield is devastated over what happened, still trying to understand how stephen paddock could kill so easily. >> i still want to know more about paddock, and his motivation, and why, and why so many innocent people. >> reporter: it's a question that authorities have not been able to answer so far, just as stephen paddock would have liked it. >> he loved the mystery because he was a mysterious guy. >> reporter: former fbi profiler brad garrett, now an abc news

consultant, took us through the factors in paddock's background that are now being examined. a criminal father. an addition to gambling. a fascination with guns. a twisted loner, tortured with delusions. next week, portions of paddock's brain will be sent to doctors at stanford university who will examine it for any brain disorders. >> there is a suggestion that in brains of very violent people, their brains are a little different. >> reporter: when you look at the profile of mass shooters, he doesn't seem to fit it, does he? >> no. he's an older guy, made a lot of money, successful at gambling, successful at real estate. people may not like him, but they probably respect him because of what he's done, but yeah. >> reporter: adding to the mystery for some people who did actually like him and did not think he was crazy. >> he was good to me. he was kind. >> reporter: lisa crawford

worked for paddock when he owned an apartment complex in texas. >> the man that i knew, that i thought was my friend, that i thought was a friend of the family. i feel so much shame, i'm embarrassed. >> reporter: one thing that paddock was not, was part of isis. even though the terror group tried to claim the 64-year-old multi-millionaire was one of theirs. >> when that came out, i just actually laughed. he wouldn't care enough to join isis because he doesn't really care about anybody else but himself. >> reporter: paddock's only real passion seems to have been gambling. a high roller treated like a king by the casinos. obsessed with video poker. claiming he made millions at it. >> he gambled for 20 plus years successfully. it was like a job to him.

he did it mathematically. >> reporter: the night of the shooting, he was in the high stakes video poker area at the mandalay bay hotel playing into the early morning hours. he won several big jackpots. but court records show that six years earlier, paddock did have one contentious encounter at a casino at the cosmopolitan hotel when cameras caught a moment he slipped on the floor of the lobby. paddock sued for damages claiming he tore his hamstring but the hotel lawyers say the surveillance video shows he was probably drunk as he was when they say, he showed up to testify. >> he was carrying a beer in a paper bag, wearing shorts, had very cheap flip-flops on, kind of unkempt looking. >> reporter: in his testimony, paddock said he suffered from anxiety, didn't like being out in the sun and was prescribed valium. it was perhaps an early indication of what investigators now believe was paddock's slow descent into madness.

>> the combination of age, deterioration and the idea that he's just decided he's just mad at the world that i really want big time attention, and boy does he have it. >> reporter: just as paddock's father did in the 1960s, when he was one of the fbi's ten most wanted fugitives. young stephen was 7 years old when his father, benjamin hoskins paddock, was arrested for bank robbery. what's similar between paddock and his father? >> anti-social personality, tends to be a manipulator, tends to get whatever they want, tends to blame everybody else for their issues. >> reporter: after being released from prison, the father opened up a bingo parlor claiming it was part of a church. there were local reporters. >> you guys don't print anything, you don't tell anything but lies, you have never been on my side, forget it. >> reporter: one prominent theory now among law enforcement is that paddock wanted to somehow outdo his criminal

father. >> so is that part of it? does he want to be more famous than benjamin? >> reporter: on the day of the shooting, paddock made five separate trips back and forth between his home in mesquite, and the mandalay bay hotel, 70 miles away. presumably shuttling his weapons, setting up his 32nd floor sniper's nest. he left behind no social media footprint, no manifesto, no suicide note, and we learned this week, the hard drives on his computers are missing. >> i think this is going to boil down to, i want attention, and i want to feel powerful. >> reporter: and that's the motivation to kill all those people? >> well that's the motivation for every mass shooter. >> reporter: so that's just sick? >> that's just sick. >> reporter: tonight, the body of stephen paddock is being held at a secret location. no funeral home has reportedly been willing to handle the arrangements for a man whose evil acts defy any satisfying explanation. why? if any of his family members, or his friends knew him so well, why?

somebody knows something, and the plot thickens. >> reporter: next, a first responder with his question. was there a second shooter?

the holidays begin here at the disneyland resort.

"20/20's" mystery in las vegas continues.

once again, here's matt gutman. >> reporter: at a firehouse in tacoma, washington, one of the many heroes of the las vegas tragedy isn't feeling very heroic. >> it's been hard to sleep. it's been the hardest. you lay down at night and go to sleep like anyone else does in this country, and usually a minute into it, i'm right back in las vegas. >> reporter: when the shooting started he sprang into first responder mode stabilizing this young victim and helping get her to a hospital. >> you guys okay? >> i need to get her transported. >> reporter: today he's not looking for praise. what he really wants is an answer to his burning question from that night. >> my heart of hearts believes there was only one shooter. but the part of me that questions is was there more people involved? >> reporter: we have been trying repeatedly to get an interview with the las vegas sheriff, the fbi, the atf, anybody who could

help put doubts about the investigation to rest. we have been calling, calling and calling for an appointment, but no one will answer. as we wait outside the sheriff's office some officers bump into us. there are so many conspiracy theories. there are rumors, people are curious about what's going on. >> the investigation is ongoing and there is more information they have obtained however, it's not ready to be made public at this point. >> reporter: in the vacuum left by their silence, conspiracy theories have sprouted on the internet like a fungus. >> more and more people are questioning the official story. >> we have solid scientific proof there were two shooters in las vegas firing into the crowd. >> stephen paddock was selling guns to the mafia. >> reporter: no matter how wild the speculation, it all begins with the suggestion that stephen paddock was not acting alone. the night of the shooting you

tweeted out multiple times that there were multiple shooters. >> yes. that's what i was getting direct from the police. >> reporter: radio host wayne root tweets not only said there were multiple shooters but that was definitely muslim terrorism. >> everyone thought city wide terror attack. who could pull it off except isis? only in the united states of america -- >> reporter: there is no independent proof of that or any of his theories. he says that's because proof may have disappeared on the missing hard drive in paddock's hotel room or in the strange break-in in paddock's house after the shooting. >> how do you let it happen if you're law enforcement? that's my question. right now, the story doesn't add up. the story doesn't make sense. >> reporter: take, for example, the story that paddock made a fortune playing video poker. is it a game that's easy to win and i guess win large sums? >> not to my knowledge. it's probably a pretty good game to play if you wanted to launder your money. >> that theory goes on line with the gun running conspiracy theory.

>> reporter: annie apalma writes about conspiracy theories for snopes said paddock was selling guns from the hotel room is part of a broad, overarching conspiracy note as the false flag. >> that's conspiracy jargon for an event manufactured by the government. so the government has pretense to seize guns and then the new world order can come in and take over. >> reporter: she says what may seem like crazy speculation comes mostly from social media. where people justify their tortured conclusions by stitching together snippets of real news. >> do you think this was all accomplished on his own? >> reporter: including the sheriff's own words at this press conference early in the investigation. >> you got to make the assumption he had to have some help at some point. >> the sheriff himself announced there may have been a second person. so that alone helps perpetuate conspiracy theories and maybe a second shooter.

>> reporter: as cell phone video surfaced theories about multiple gunmen only got worse. >> two shooters! >> reporter: do you think that just the way the gunfire echoes in a town like this -- disori t disoriented people making them think the gunfire is coming from multiple directions at once? >> absolutely. >> reporter: listen here. there's an obvious sound change, a deep burst followed by a sharper crackle sound. [ gunfire ] >> reporter: many people on chat boards like reddit were sold. >> if you don't know what you're listening for, then, you know, it could be anything. to the average person. >> reporter: but retired new york police ballistics expert disagrees. >> you hear gunfire and then you hear a second set of gunfire. more pronounced set of gunfire. >> reporter: remember, investigators say paddock had

many weapons. >> clearly two different firearms but nothing telling me it's two different shooters. nothing. >> reporter: it wasn't just sound, it was also the sight. >> right there baby. >> reporter: internet claims this flickering light is muzzle flash coming from the 22nd floor meaning there was another shooter lower down. >> it seems like it's coming from up there. oh -- >> but that was very easy to debunk. if you go out to las vegas there was no other broken windows. >> reporter: but speculation persists that one man could not have done it all alone. especially an unassuming 64-year-old. >> that was one of the first questions, how does a guy of that size operate an automatic weapon for ten minutes. didn't really make sense. >> reporter: by october 9th. the sheriff's earlier vagueness vanished. now he was unequivocal. >> we have uncovered no evidence

to show there was a second shooter. >> reporter: nevertheless the conspiracies live on. >> don't blame people for theories when you're feeding it all by cutting off all access and shutting it down. >> reporter: things have gotten ugly. some survivors have been attacked online by conspirators who think they are actors part of a coverup. dane mccally deplores that behavior, and he is confident the professional investigators will do their jobs. >> whatever the feds come up with i'm sure will answer it. >> reporter: coming up, the woman closest to panic. what did marilou danley know. i love you, basement guest bathroom. your privacy makes you my number 1 place to go number 2. i love you, but sometimes you stink. febreze air effects doesn't just mask, it cleans away odors.

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no, don't leave! just stay down! >> my name is lisa fine and what i witnessed was the most horrific thing i've ever seen in my life. >> run! don't walk! >> it was a war zone and i was certain that we were all going to die. >> reporter: it's been a month since the las vegas shooting, lisa fine is not fine at all. >> i was told by a doctor that i needed to just breathe, and relax because when i went in my blood pressure was 165 over 110, and it's been like that for weeks. they had to give me some medication, and just kind of tell me to calm down, and that i'm not in any danger anymore. >> reporter: the personal trainer had been looking forward to the country music concert, decked out in her cowboy hat and boots, she was ready for a special weekend. but now, she cannot seem to shutdown, and recharge. she joins a long line of vegas shooting survivors who suffer from sleepless nights.

>> it is harder to go day by day, especially at night. i don't sleep, i have not slept yet. during the day, i get distracted by some things. >> reporter: and fine has a nagging question, what does stephen paddock's girlfriend marilou danley know? >> the thing that really bothers me is the fact that his girlfriend says she did not know of any of this. that to me is shocking. >> we are interested in a companion, and her name is marilou danley. >> reporter: so exactly who is she? in a way danley was an international woman of mystery, world-traveler, gambler, high-roller casino hostess who had been living with paddock since 2013 while he was amassing his arsenal. at first authorities believed she could be in las vegas. >> she is an asian female, approximately 4'11", weight of

111 pounds. we have not located her at this time. >> reporter: but they were surprised to learn she was halfway around the world in the philippines. >> we still consider her a person of interest, and we plan to engage her upon her return to the country. >> reporter: when she arrived back into the country two days after the shooting, filmed by knbc, the fbi pulled danley in for questioning, and the world wondered, would she be able to shed any light on stephen paddock's mindset? and perhaps more importantly, was she in any way involved in the las vegas massacre? >> they felt she represented one of the biggest possible keys to unlocking this whole mystery. she was the closest person to him. >> the very first thing you look at with a mass shooter is who are the significant people in his life, and in his case you can't find anybody, but marilou. >> reporter: danley had been overseas in the philippines for

almost two weeks prior to the shooting. in an interview with australia's channel 7 news, her sisters say the trip was her boyfriend stephen paddock's idea. >> she didn't even know she was going to the philippines until he said, marilou, i found you a cheap ticket to the philippines. >> he sent her away so he can plan what he's planning without interruptions. >> reporter: while in the philippines, danley received a wire transfer of nearly $100,000 from stephen paddock. >> that money that she received in the philippines is very concerning to me. that's that has me very unsettled. >> reporter: but danley's family says she was surprised to get the money, and believed paddock, her boyfriend of four years, might be dumping her. >> she thought he was maybe going to break up with her because he sent her away and sent her all these money. that that was a sign of a break up, not a sign of all of this violence that was to come. >> reporter: danley's brother, who lives outside manila spoke to his sister after the shooting.

she told us, just relax. there's nothing for you to worry about, our consciences are clear, so don't panic. that's what she told us, she said, i'll fix this, you all don't have to worry. >> in a phone call to her brother, marilou danley says, don't panic. i'll fix this, we have nothing to worry about. what do you think of that? >> she probably told them everything that she knew, recognizing that she didn't know that much, and it was ultimately going to resolve itself. that's probably what she meant when she talked to her brother. >> reporter: back in the u.s. danley's former stepdaughters, were shocked when they saw her picture on the news. marilou had been married to their father for more than 20 years prior to her relationship with stephen paddock. >> marilou is a wonderful, wonderful person. she would have nothing to do with anything like this. >> never would we ever in our lives think that she would any way be affiliated with this ever. >> yeah. >> reporter: neighbors of paddock and danley say they were

a bit of an odd couple. >> this lady that was living with him, she was more of less an extrovert, and i thought he was really an introvert. >> reporter: the general consensus among those who knew them was that marilou was the better half of the couple. adam le fevre visited their nevada home . >> it's not what i saw as a loving, caring relationship. marilou, as i said, a lovely girl, seemed very nervous and jittery around steve. he would talk in a more of a condescending way at times. >> reporter: and paddock would leave danley at home while he went off to casinos. >> as far as what he was doing day in and day out, what was in his mind, what was he thinking, i doubt if he shared much of that. >> reporter: lisa fine has her own assessment of danley. >> i've been a girlfriend, i've been a wife and it makes no sense that she wouldn't know. >> reporter: investigators at this stage believe danley neither played a part in nor had prior knowledge of paddock's actions.

through her attorney she said -- >> he never said anything to me, or took any action that i was aware of that i understood in any way to be a warning that something horrible like this was going to happen. >> reporter: next, finding ways to cope. >> hey lexi. this is lexi. she's a little s jimmy's gotten used to his whole yup, he's gone noseblind. odors. he thinks it smells fine, but his mom smells this... luckily for all your hard-to-wash fabrics... ...there's febreze fabric refresher. febreze doesn't just mask, it eliminates odors you've...

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i just want to know what happened. >> it will never make sense. it will never make sense to me. >> i feel like we all do want answers. we want to know why.

>> reporter: while the victims of the shooting wait for those answers, each has found a way to cope. >> hey lexi. >> reporter: russell bleck has found some peace at home with a new friend. this is lexi. she's a little service dog. she can kind of sense when i'm stressed out wakes me up from nightmares she sort of senses our emotions. >> reporter: for mike greenfield, music has become an outlet. >> i'm just trying to keep moving. i can't sit and dwell. the best counseling i think that i could give myself right now is talking to the ones that were there. >> we are a team we're family. we witnessed something horrific. >> i saw the worst of humanity but at that same exact time i saw the best out of humanity. like first responder dean mccauley. >> we're all trying to heal. and we're tryin' to learn from this. i'm still a dad. i'm still a husband. i still got my husband duties and my dad duties. i'll be walking with my son and

i'll just zone out for 10, 15 seconds thinkin' about that night. it's kinda hard for me to get over that hump right now. >> reporter: counsellors say that rather than looking for closure, establish a new normal. >> i think about sonny all the time. what i've been trying to make myself do is the things that i know he would want me to continue to do. >> reporter: within a few weeks, heather will move into the house she and sonny had spent two years building. >> every color choice, every cabinet choice, we both did together and so this was our dream. >> reporter: to keep sonny close, she buried him in their backyard, in his favorite eric church t-shirt. >> he loved that land. he loved the property. there wasn't any other place that i felt was more suitable to him. we spent a lot of time out of this deck, just kind of watching the sunset. >> reporter: and she's planning one final tribute to her husband a tattoo with the words of the eric church song "why not me" written in honor of the las vegas victims. >> i will have a tattoo that

says, "why you, and why not me?" i think it's a question that myself and probably every other survivor asks themselves all the time. ♪ why you and why not me >> along with several other survivors lisa fine has started a support group, a nonprofit called route 91 strong. >> they are organizing concerts to raise money and awareness to turn tragedy around and focus on healing. that's our program for tonight. thanks for watching. i'm elizabeth vargas. >> and i'm david muir. we'll stay on this las vegas story and from all of us here at "20/20." good night. police investigating the theft of not one, but two guns

and a lot of ammo from