tonight from las vegas. an extraordinary and chilling portrait of what played out here. >> i just thought if i'm going to die i want my kids to know that this is what happened. >> told by those who survived it. >> make this place safe tonight. >> such a great vibe. >> as far as the eye can see it's shoulder to shoulder people. i was getting that on videotape. >> jason aldean was playing and we were so excited to see him and all hell broke loose. >> run don't walk! >> get everybody off the stage. >> tonight their stories of

heroism. >> get up on your feet. >> i justor on to me, we're goi get out of here. >> every day americans trapped in the unthinkable. >> he just wrapped his arms around me from behind and that's when i felt him get shot in the back and we fell to the ground. having someone that loves you so much and would take a bullet for you. >> i'm a professor firefighter. i'm going to take care of your daughter. i don't know how we're going to get to the hospital but we'll get there. >> people just like you and me were helping people. the most beautiful thing i've ever seen. >> it feels like i didn't do enough. that gets me the most. >> now, hundreds of lives, families changed forever. >> don't let some crazy man or person or terrorist make us be afraid to live the way we -- we need to be

presentation. las vegas, heartbreak and heroes. >> it's relaxation central, there's this kind of legacy of las vegas as being a place where something secret happens, maybe you go on your own but las vegas is also the place where you -- where people go in groups to have a wonderful time, and they dance and maybe they gamble and hear music. the route 91 harvest festival had been a success for a number of years it's 20,000 people, a three day concert. you had a great cross sections of americans who all wanted to come to that festival and it drew all kinds of people. my name is heather melton. and i live in big sandy, tennessee. sonny says that when he first saw me that i stole his heart. we kind of like to do some travelling and this year, our thing has been going to concerts. and we were very excited to come to the route 91 festival.

>> my name is dean mcauley. i'm a professional firefighter up here in washington state.toh year -- route 91 harvest fest in las vegas. it's what we do. >> my name is jonathan smith and i am a copy repair technician based out of orange california. i recently just got into country music i know people are like "why is there a black guy at a country music festival, but i've always listened to country. i can listen to any country song and it'll just take me away. >> my name gianna baca and i am a cheer leader. my sister natalia baca, she's sassy like me. the best thing about being a twin is that we're always together and we're never alone so you always have a best friend with you. >> my name's lisa fine. and i have two children, and i'm a professional organizer and personal trainer, nutritionist. and i live in roseville, california. >> my name is michael greenfield. i'm a musician, stage technician, i do a lot of different shows out here.

anywhere from corpora events to full on stage concerts. >> i'm nick miller. i'm a guitarist. i play for singer, adam craig. this was the first time that i had been to this particular festival so i was pretty excited to get to vegas and really experience it. >> i'm breanna skagen. >> i'm russell bleck. >> we got engaged -- on september 10th in new york. we were sailing and he popped the question. we were celebrating the engagement and we got free passes to the festival. >> thursday september 28th was actually my boyfriend's birthday we went over to the top golf hit some golf balls. >> i spent my day at -- national personal training institute, at school. >> on thursday i was doing a lot of laundry.

>> we actually went to work that epn carrier. he seemed like a very ordinary person who didn't mix well with others, very few people knew much about him. >> i thought this guy is so into himself and i've never met an individual like that ever, where you couldn't create some emotion one way or the other. >> paddock's girlfriend was marilou danley. he met her at a casino in reno, nevada, the atlantis. she worked there as what's called, a casino hostess, for high end players in the video poker area. toolgt they

world and comped with all kinds of ameties.eplight to the philippines. after she arrived federal agents discovered he had been wiring tens of thousands of dollars to someone in the fiphilippines. she said she had no idea anything was amiss. >> it's thursday, september 28th, and paddock pulls into the mandalay bay, leaves the car with the valets and walks into the hotel. one of the things everyone sees is a sign that says no weapons permitted. he gets a room called the mandalay bay suite. this is room 32-135. and this is one of the nicest suites in the entire hotel. it's 1700 square feet. right on the corner of the hotel, with a perfect view to that concert venue down below. >> at about 11:50 in the morning, we had just landed in vegas.

just ready to get on my country outfit and have fun.so many bane were excited about seeing. number one, especially for sonny, was to see eric church. >> and the thing about these country concerts is it's all a tailgate, it's all a party. >> and you walk in. and i'm lookin' at my phone for my list of all the t-shirts and stuff that people want back home. >> i bought a cowboy hat, got a bling belt buckle, and just really was excited that i was gonna have this really fancy cowgirl outfit to wear, and dance around, and have the time of my life. >> i decided to wear a black hills matter shirt. it's actually the mountains in south dakota so i wore it just for laughs and giggles. >> i was actually here in las vegas covering oj simpson. >> simpson said he wants to move to florida to be near his children.

>> my sister and i were really excited. we were like this is our first concert outside with a lot of >> saturday was a seminormal day. i decided to go in a full ensemble ended up dancing with a few women -- >> my favorite musical moment was when sam hunt was getting up on that stage and gonna sing all the songs i absolutely love. >> those thousands of concertgoers are down below, what they don't know is there's another spectator. he's on the 32nd story of that building looking down on them and he's planning something beyond sinister. when you have a cold... stuff happens. and he's planning something shut down cold symptoms fast

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>> reporter: a casino employee told me 2010 saturday night and sunday morning she watched paddock play the high stake section of the casino for hours and hours on end. he was there until 7:30, at least, in the morning of the day of the shooting playing that video poker. >> if gambling is one of his demon he wanted to get one more fix, and maybe also it pumped up his anger and rage.

>> we just got up and had br and then just kinda hung out until we decided to go over to the venue. >> we just were hanging out at the house and, just putting on outfits and stuff and just so excited for the festival. >> we flew into vegas, went straight to the festival. checked in. >> we started walking into the festival and i took a quick snapchat and the caption read wonder what kind of trouble can i get into tonight. >> my parents didn't really like us going places without them, and they were like oh, your seniors and you're almost 18 so they were just like, we'll just let you guys go without us this time. we -- stay at the luxor every year. it's right across the street from the venue. it's right next to the mandalay bay. >> sunday, i'd gotten the call -- "hey, do you want to work tonight?"

>> on sundas. david copperfield, a show called michael jackson's one playing at the manned day bay in addition to the route 19 harvest festival. las vegas was alive and jumping as it is every night. >> we went on stage and there were a lot of people at the festival. >> it takes about 15 minutes. went to the venue and i got dropped off right out front. >> just the excitement and energy were off the charts and everybody is in there, you know, amazing, cowboy gear and looking so cute. >> we'll see what you got las vegas. >> over the weekend as down below people are drinking beer and reveling in this route 91 harvest festival,

center and he is slowly stockpiling this massive arsenal in his room. he's got 10 case those are long ns one thing we have never seen in the history of lone shooters is the elaborate system he has enveloped himself in inside the room. he's got a baby monitor set up. cameras, one hidden under a plate. he had installed the camera right in the peep hole of his door. the purpose is that he would be able to monitor from inside the room if law enforcement approaches. he's ordering room service and those trays are coming in but notably he didn't want house keeping in there messing with his stuff. he had that do not disstate your name sign out on the door.

lot of people and different bands playing. ♪ c'mon >> the venue was set up incredible. you just felt like you were safe, becaus metal detecters. they looked in our purses. >> i think, with the training and the background that i have, i'm always lookin' for exits, no matter what. i do remember -- looking at those fences and lookin', like, "how do we get out, if something goes wrong?" >> there were so many people like, everyone was really nice to each other, even random people, they would come up and dance with you. it was really fun. >> we're all excited, happy, and the music is incredible. music always touches our hearts and lives. us girls we like those cow

bring about love and fun and >> we were dancing to -- as much as you could, shoulder to shoulder. ♪ it was -- it kinda was, like a throwback to the '60s of, you know, peace, love and happiness. >> every year w

for us. >> one of the most moving parts of the whole three days was they sang "god bless america." the whole crowd was singing at the top of their lungs and had their phones lit up. ♪ >> reporter: as the music is playing there's a different sound happening on the 30th floor. he's using a hammer to smash through at least two win ghoes the suite to gain a vantage point down below. >> i was looking forward to jason aldean. >> jason aldean is huge. ♪

>> the whole vibe of the show is upbeat and fun and loud. >> jason aldean started. i was so excited to see him. ♪ >> you have the sickening feeling that none of these people down below had any idea of the carnage that was just about to befall them. >> we had the vip wrist bands for the neon tent. >> we took a photo, her and i took a photo. after that photo, the contrast was so dramatic. it was the calm before the storm. you had not a care in the world. two minutes later, literally two minutes later, i looked at the time stamp and everything changed. like, with an instant.

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♪ >> i had no sense that we were in any danger at all. and it felt so safe. >> you see as far as the eye can see. just shoulder to shoulder people. showing that on the videotape how big the crowd was. >> stephen paddock has his weapons lined up ready to go. >> we were in the front row enjoying jason aldean and in the video we are so happy. everybody is thrilled and ten minutes later all hell broke loose.

>> the shots fired. it felt like fireworks honestly. >> that's just a fire cracker. >> why would they do that? >> i turned to sonny and said was that a gun and he said i don't think so because the music was very loud. >> i heard a crackle sound. and it was so odd. i've been around firearms my whole life and i didn't think it was a weapon at all. i thought it was just some feedback, maybe from the amplifiers or something. so i continued to shoot. and then i hear somebody was like, "was that a gun?" and i was like, "you know what, on second thought that sounded like an ar-15 from far away." >> that was an ar. >> it sounded like somethin' out of -- you -- you hear in the news with afghanistan or iraq or -- you know, any of the movies we see now. just the click, click, click, click, click, click, click. >> that doesn't sound

real gun. >> it is a real gun. off the stage. and people started running. >> i had a little -- little mini flashlight, so i start waving it to everybody. i'm like, "guys, get everybody off the stage. everybody off the stage. i see the road crew and a bunch of people running off the stage, takin' jason aldean with him. runnin' as fast as they could down the stairs. and my first instinct was to get the flashlight on the stairs so that they can at least see where they're goin'. >> they weren't stopping. the shots were not stopping. they just kept going and going. and-- i mean, the only thing that we could think of was just to run. just to run.

>> keep going please! >> my boyfriend threw me to the medicine ball, like a hundred pound medicine ball landed on me. so it was like i got hit or i got shot. >> i said to sonny, "we just need to get down." and he said, "no, we can't get down, 'cause we'll get trampled." and that's when he -- just wrapped his arms around me from behind, and we started running. and that's when i felt him get shot in the back. and we fell to the ground. i felt the impact of the bullet in his body, 'cause he was holding me. and i think he could hear me at first. but i -- i couldn't tell where he'd been shot from. i just saw a lot of blood. and i couldn't tell, i couldn't tell. and he cou

and i couldn't fee and there was still bullets flying all around us. >> i was pinned down i couldn't get out of there. you can hear the -- sounds. it sounded like the shots just raining through the tent flaps. and you had no idea where the gunman was, where the shots were being fired from. >> get out of here, there' gun shots coming from over there. go that way. >> uniformed police officers at the venue, they get pinned down, because they're right there with the crowd. had their body cams on and you could see them, sort of the fear in like the unknown of where is this coming from? >> they're shooting right at us, guys. >> where is it at? >> coming out of a window. >> and i decided that i wanted to record every single thing that was happening, i just thought, if i'm gonna die, i

[ crying ] to know -- to know that this is what happened. >> you're seeing people plugging holes with their fingers to stop the blood. and ex-military telling everyone where to go, what to do. "stay low, keep moving, don't stop." i saw every single one of these police officers running towards the danger. it was all survival. but you saw the best out of everybody. >> there was a hero that -- in one of my videos that he -- he ran out there. he risked his life and that man, he -- you'll see it. he jumps out of the -- out down. and he kind of looks around for gunfire, and then he goes out there to assist. and i don't know if he's alive. i hope to god he's alive. >> you could hear people shoutin' for help, and, "need a medic," and -- "i've been shot." >> it wasn't u

the corner -- that we seen a et. two seconds after we turned the corner and she dropped. she just dropped. weightless. like nothing i've ever seen before. >> it up on your feet. on your feet. >> thank you. >> i heard a gap in between. and i'm like, "okay, he's reloading. you gotta get out. you gotta get out. go now." and i got up and i ran. >> when i got up and i just -- st run, run, run."st happened. >> run, don't walk! i mean, i was, like, it just is tunnel vision at a certain point. >> i turned around and i just basically, ran back towards the gunfire to help up as many people as i could. that's when it took a horrible turn for me. as i stood up i took a shot to

>> i told him i was an>> once t is coming from the 32nd floor the next point is to figure out where. this hotel is massive. this one security guard who was unarmed begins to approach room 32-135 where paddock is. he's watching him through the surveillance cameras he set up and he starts opening fire hitting the guard in the leg. that provided police tactical teams the crucial intelligence they needed to know exactly where stephen paddock was. as the s.w.a.t. teams entered the 32nd floor they understand they have never in american history experienced this and have no idea what's behind

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>> we have a team that's on the second floor of mandalay bay and we're slowly working up. >> reporter: the firing has stopped at this point, so it gives the swat team a time to take a breath and then begin to assess the situation because what they don't want to do is get anybody hurt. >> "control zebra-20. we are at the end of the hall. we are gonna be peeking out into the hallway. those officers that are down the hall need to acknowledge so we don't have a crossfire." >> reporter: what police didn't know is that as they were trying to peek towards his suite at the very end of the hallway, he had full eyes on them. >> i

hallway to be aware and get back. ro the time that the security guard is shot, until the swat team makes an entry into stephen's room. >> "breach. breach. breach." [ explosion ] >> so they use explosives that are particularly designed to blow doors. so it blows it back in the room, toward the bad guy. it creates such a blast that also allows law enforcement to immediately come in behind the blast. >> "we are clearing this room. we have one suspect down." >> "is that room 135?" >> "that's affirmative. one suspect down in 135. i have the floor." >> he had killed himself. now, he thought of everything, because he didn't use one of those rifles to kill himself, he used a handgun right in his mouth. >> also in the room you could see the huge numbers of shell casings for all the rounds he fired. they found his weapons. >> "we've got the east room secure.

multiple firearms. this is definitely the place where they were fired into the crowd." were long guns. if you look at what pictures that have been released. so far, you see, i think, all the bump stock, which basically is a device when you place it on the gun, you can virtually put your finger on the trigger, and it literally will fire basically like an automatic weapon. >> hey you guys! get down! go that way! >> reporter: we wanna switch over to our matt gutman who is in las vegas at this very hour, matt what do you know, what are you hearing? >> reporter: what seems to be the pervading idea right now is that there's mass chaos, there is tremendous confusion, and really this is a city under a tremendous amount of fear, not knowing what's going on. >> i heard a medic scream that she needed help. she was tryin' to start a line on natalia. i said, "what -- where's your wound?" and she said, "i have been shot in the back." i said, "if -- if you make it out there, i promise you i'll --

i'll make sure you're safe. >> and there was no ambulances out there. running out to our parking lot with their guns pulled. and they kept screamin', "get down. get down. active shooter. there's another shooter. there's multiple shooters." >> get out of here, there are gunshots coming from over there, go that way! >> they had like their armor and stuff and they kept telling us to go. and we just kept running across the street towards tropicana. >> there must have been about 1,000 people in the tropicana that i could see. i remember a staff came in and said the police have surrounded the building, we're on lockdown the safest place for you to be is right here on the casino floor. >> it's weird how your brain goes into hyper-focus mode. everything went tunnel vision, but in a way where everything was clear and you can calculate every single decision you make. >> it just is tunnel vision at a certain point. you're paying attention to every single little thing. and yet, it's a twilight zone.

body experience. >> keep your head down and run act if my sister is dead or if she -- i don't know where she is. >> so i said, "natalia, we have to -- we have to take shelter behind this suburban, and i'll figure it out." so we hid behind the suburban. and i found a little lawn chair that was underneath it, and i put her in it. and we had a tactical guy come by us and say, "you guys have to get down," and i'm holding an i.v. bag up. >> you guys okay? >> i need a rig, i need to get her transported. >> i was like can i please call my dad. >> so i called her dad on her phone. gave her the phone. and she was so calm and said, you know, "dad, i -- i've been shot. i'm gonna be okay. and i took the phone and i said, "sir, i'm gonna take care of your daughter. i don't know how i'm gonna get her to the hospital, but we'll get there."

>> do you have any other truck. those two men performed cpr on sonny the entire way to the hospital which seemed like an eternity and we ended up at a small hospital that was not a trauma center but we were the first people there. >> and i see the -- i see this audi. got the guy to come over, opened up his back door. and put natalia in the back. she was getting numb. and i pulled out my phone. i was searching for pictures of my dog, and my wife, and my son, and she was just immediately lit up. >> it was so cute because his family is so beautiful. i love dogs. so he showed me his dog, white and fluffy. it was cool to see because this completely stranger is showing me his family.

hospital i saw my sister in the wheelchair. and she was hooked up her but i knew she was okay. we said we loved you, like loved each other and held hands. we never really do that. so it was like different. >> seemed like forever but must have been two, three minutes to get to the hospital. they were like he needs to go to trauma 1. >> it wasn't very long before i knew that he had passed. i mean, really in my heart i feel like it happened on the field. and they pronounced him. and i was right outside of the room when they did. and i just kissed him and hugged him. it's, like, how can this be real? how can i have come here to have a good time with my loved one, and leave without them?

>> we got in the car and went the opposite way of the strip. went over barricades, we ran every red light we could. and just kept going until we hit the >> i just remember my brother coming to the door and i just hugged him so tight and we were both just crying. >> the first person i called was my son, and i said, "sweetheart, there's been a mass shooting. and i'm in it right now." and i just told him, i said, "i love you so much. you're the best son in the world. and i'm so proud of you." >> i called my mom. and she was like, "are you all right?" and i was like, "no. like, mom, i've been shot." and they know me as a jokester, they thought i was playing and i was like mom, i'll send you a picture right now. she started balling tears. i really thought that was gonna be the last time that i would talk to anybody. >> i just remember the homicide detectives walking in to talk to me. and i just wanted to run away. like, i don't wanna. you know, i don't wanna be the

>> we heard about two fatalitie. once the press conferences started, basically in the middle of the night, and sheriff lombardo began talking, the numbers started rising. it's cliché to say, but it was surreal. >> we determined there was a shooter on the 32nd floor of the mandalay bay. officers responded to that location and engaged the suspect at that location. he is dead but we are interested in a companion that is traveling with him and her name is marilou danley. >> okay. marilou has disappeared. the big question is who is she, where is she, and what at this point does she know. coke zero is now coke zero sugar, with great coke taste. some people were excited to hear the news, some were skeptical. so we're not going to have the star of the show you're watching come out and say "you'll love it!" no special jingle written by this week's hottest pop star

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>> vegas made world news on its own just by being a tourist attraction, being a hotspot. and -- now we're -- now we're labeled something else now.

>> the deadliest mass shooting in history has happened here in las i don't want to say that i'm gonna have p.t.s.d. or anything, but there's a part of me that it feels like i didn't do enough. that gets me the most. i just wanted to be with my loved ones. and i just was shaking so bad. i just wanted to -- to just disappear out of las vegas. >> the airport was resecured and started operations once again. >> i got home, that's when i ran -- to my son. and he just embraced me and picked me up and threw me around, and just really gave me the biggest bear hug ever. >> reporter: you still can't look her in the face? >> that's what is hard. that's the one thing that brings things back is, you know, it's -

little weird things like that.a? >> yeah. >> reporter: how do you try to help him? >> i mean, just try to be there for him. he'll kind of go and hide and i'll just let him do his thing. and -- >> reporter: and you know what he's doing when he goes to hide? >> yeah, 'cause i know, like, he doesn't wanna express it in front of me. reporter: why? >> i don't want her to relive what we went through. >> reporter: 59 killed in this attack. there are hundreds of patients at hospitals throughout las vegas. >> we're hoping to go home today -- just waiting for the mortuary to release sonny. i am adamant that i'm not leaving here without him. i wanna get him home. i wanna see my kids. but my kids are anxious to be with me. so i need to, i need to get to them. >> in my wildest dreams, i would never imagine this scenario.

i'm going back with two suitcases.w i waouit. >> reporter: what happened in vegas is not going to stay in vegas. americans are going to change the way they perceive public spaces. in the aftermath of the shooting, the first thing that was critical was the motive, what drove him. >> there's still fbi forensics teams combing through the fairgrounds. they don't want to miss a single piece of evidence. >> stephen is an odd duck from the standpoint he's a guy that sort of created in my crew this mask of sanity where he acts okay on the surface.

turmoi girlfriend is now being called a person of interest. >> marilou danley arrived tuesday night and authorities were hoping they might learn more of the mind set of the shooter, about his motive. she claimed to know know knowledge at all. law enforcement officials after her account, there was great skepticism based on the fact that how can she not notice something was going on. >> reporter: stephen paddock seems to be the personification of evil but flickers of beauty, humanity. people sacrificing their own safety for complete strangers. >> i've replayed that night in my head a million times. i'm excited to see natalia. it will

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another woman was murdered last night. [ faint screams ] we need to find the pattern. who does he leave the snowmen for? [ distorted voice ] by the time you read this, [ distorted voice ] i will have built a new snowman. have you seen anything like this? never like this. [ gasp ] the snowman. rated r. in theaters friday, october 20th. this incredibly wonderful spirit that i met such a horrible night, on sunday night at route 91.

>> you guys okay? >> i need a -- i need to get her transported to the hospital. its very emotional coming back to this hospital, it's ah, a lot of stuff happened here. >> you look stunning. i wanna give you a hug because i've been i didn't give you a hug for four days. hi love. how you doing? >> thank you for coming. >> absolutely. you're amazing. >> thank you. >> i will be able to heal knowing that i made a difference, because there's a feeling that i didn't do enough. and i think a lot of us first responders feel that way because there is a lot of people who didn't make it. >> the reason i'm here tonight is because of heather milton, her husband sonny who died.

over here. the there's some empty seats. >> i don't want his name to be forgotten. and i want more people to know the name sonny melton than they know whoever that guy is who shot us. >> something broke in me sunday night when that happened and the only way i ever fixed anything has been broken in me is with music. so i wrote a song. ♪ when the morning sun >> this shirt has become a symbol of him to me and i'll always remember him wearing this shirt. i plan on burying sonny in this shirt. ♪ i asked the god of all knowing wisdom ♪ ♪ why you and why not me >> music brings

and coming together like that in response to an event like this, it helps everyone heal. >> when you see the faces of the victims, you see how different they were. they are people from all over the country. they were african-american's, his hispanics, gays and straights. a community not based on anything except love of the music. ♪ why you full of life and promise ♪ ♪ at the top of your lung so loud ♪ ♪ my songs that you sang so sweetly remain in my ears forever ♪ ♪ when the morning sun hits the mountain ♪ ♪ and a glorious still calms the breeze ♪ ♪ i'll ask the god

♪ why you and why not me ♪ the faces and the families forever changed. we cannot forget. i'm david muir from all of us here at "20/20" and abc news, good night.

jonathan: homes evacuated after >> abc 7 news at 11:00 starts with breaking news. nancy: cap breaking news from montgomery county, where homes have been evacuated after a town house caught fire in potomac. jonathan: tim barber joins us now live. tim: