Tonight starts now. Good evening. And as we come on the air from orlando tonight, a new and difficult portrait is now emerging of what played out inside that nightclub behind me here. The s. W. A. T. Team captain talking for the first time, and we have new video tonight of the moments before the gunfire and then during that massacre. And when the s. W. A. T. Teams blew through that nightclub wall. Afterward, the wall riddled with bullet holes. Tonight, we also have major new developments on the gunman who the fbi had interviewed three times. And we have now learned he was under fbi surveillance for ten months at one point. How did he get those guns in recent days without that federal background check alerting anyone at the fbi . And, of course, the human face of this horrible story. The images of so many of the young people who have died. Tonight here, we have the list. But we begin with that s. W. A. T. Teamca and abcs gio benitez here in orlando. Reporter tonight, chilling new details about the deadly rampage, and the threehour standoff between police and a determined terrorist. Late night, couples dancing at the popular gay club, pulse. And just after 2 00 a. M. , omar mateen arrives heavily armed with a highpowered assault rifle, a handgun, multiple rounds of ammunition. Near an entrance, he starts to fire. An offduty Police Officer responds. Then, a shootout. And mateen moves deeper inside the club, to the main dance floor. 25yearold Amanda Alvear is there, partying with friends. Her brother shows us the snapchat video she recorded, over the music . Gunshots. [ gunshots ] amanda becomes one of the gunmans 49 victims. Gunshots. They were just one after the other, like, constantly. Reporter Police Officers now rushing into the club, exchanging gunfire with the terrorist. Mateen retreating to these bathrooms. In one, as many as 20 people huddled together. But mateen enters another, taking four to five hostages. This man, orlando, was there, playing dead. I was uncomfortably wedged between my shoulders up against the back wall, my face, my forehead up against the toilet bowl, stiff there for three hours, uncomfortable. Reporter so, you played dead for three hours straight . Yes. Really critical number thats been released tonight. Reporter thats right. Some people have been released. Its important to remember, david, 34 people still in the hospital. Some in Critical Condition tonight. Gio, thank you. There are so many people hiding in different rooms. A wardrobe room, in the bathrooms. As the gunman went from room to room. Tonight, a young man, who friends were shot while hiding in a stall in that bathroom. They had no place to go. Lying there, he texted his family, and tonight, they are talking to us. Reporter tonight, the stories of the people inside that club during the hostage ordeal. But somehow survived. Jeff rodriguez, this photo taken just 30 minutes before the attack began to unfold. He was shot three times. When the gunman stormed into a bathroom, where he and so many were hiding. At least a dozen others. Nearly the entire group huddling in the handicap stall, trying to barricade that door, as well. He sends a text message to his brother, santos, who talked to us today for the first time. First text was at 2 25 a. M. , he states here, ive been shot at a club. Im dying. I love you. Dead bodies on top of me. Tell everyone i love them. Reporter he tells his brother to tell mom and dad i love them. But the Text Messages are so horrific, his brother thinks hes my heart just literally, it just, like it was broken. I was just like, my gosh, he was reaching out to me and i thought it was a joke this whole time. Reporter he wakes up their parents. Says, no, no, it cant be. Its real. And he just started, you know, crying and we all did. Reporter all of them crying. Unsure if their son would survive. One of his last Text Messages included this image from inside the bathroom. Tonight, we have blurred out the faces. Not everyone would survive. But their loved one would find himself in the midst of all of that horror in the bathroom. Some of the people in the bathroom did not survive. Reporter he was in there with them . Yes, he was. He was there. He was some of them were actually hiding underneath the dead bodies. Pretty much a survival game. Reporter and tonight, this new image of jeff, now lying in his hospital bed, after somehow surviving that scene in the bathroom. His wounds to stop the bleeding. Have you talked to him . He has tubes in his mouth. He doesnt he knows that youre there, he can hear you, but he cant say anything to you. Like, hell say, like, hell mimic it, like, like hell try to say i love you. Reporter spelling out i love you with his hands. We also met malcolm berazza. One of the survivors who got out of the club and yet still stayed to help the other victims. Even as the gunshots continued. You can see him, his hat on b k backwards, helping to put victims into any vehicles they could find when there were no ambulances in sight. They were putting victims into this pickup truck. His eyes were like, romming to the back of his head and he was with, you know, there was about four or five of us carrying him and one girl started crying, he said, i cant do this, i cant do this, and she put him down and she collapsed and started crying and, like, i dont give energy, come on, we have to do this, lets go, pick him up. Im looking at them, screaming at them to get this guy to a truck, because i know in those instances, seconds matter. Reporter and today, malcolm told me he is still horrified by how one person can inflict so much harm. How a person can do that to someone they dont know, like, they dont know anything about you. You just walk into a building and you just go and you change peoples lives, you know, so much, and its unreal. Its unreal. Reporter and then, there was the emt we met, among the first to arrive here, Julio Salgado jr. He could still hear the gunfire in the club when he lifted up his first victim outside. A young man asking julio if he was going to make it. What did he said . He just asked me if he was going to be okay. And i tried to reassure him. Reporter how hard is that . Its very hard. Its just never been on a you know . Because they seemed so helpless, you know . And its just like you know theres only so much we can do on the road. You know . That emt heard what so many of the victims were asking, am i going to be okay . In the meantime, we move to other developments involving the gunman now. For the first time, we see inside his apartment tonight. Just as we hear more about the warning signs for years. From the exwife who describes a violent and erratic husband, to a former colleague who said he hated many different groups. Heres abcs chief investigative correspondent brian ross. Reporter today in ft. Pierce, florida, after fbi agents left mateens apartment, a first look at how he lived, provided to abc news by a univision tv crew. With the reporter d messy aftermath of the fbis raid. Otherwise a portrait of a normal life, family photos on the dining table and walls. On the kitchen counter, an expired florida firearms license. And the room of the terrorists 3yearold son, filled with toys and a bike with a spiderman helmet. No sign of the devotion to isis that mateen professed during his attack sunday. But long before then, he was known as a troubled, violent man. I can just honestly say that this was a sick person. This was a sick person that was really confused and went crazy. Reporter mateens exwife, sitora yusufiy, told abc news he regularly beat her, and had a deep hatred for gays. He would express his anger towards a certain culture, homosexu homosexuality. Reporter mateen was born in new york, the son of afghan immigrants, high school in stewart, florida. A classmate recalls mateen cheering after the 9 11 attacks. He stood up and clapped. He was, like, happy about it. Reporter mateen later worked as a Security Guard at this florida courthouse, where one coworker also recalled him as man with many hatreds. Black people, women, jus, hispanics, nor did he like gay or lesbian people. Reporter his exwife, sitora, says she was lucky to escape the marriage alive. Im blessed to have the family that i do, because they saved me from from death. And brian, tonight, the fbi is now talking to members of the gunmans own family . Reporter thats right, david, including his current wife, seen in this photo. A senior courterterrorism official items abc news tonight that she is now cooperating with the fbi and has told them mateen may have scouted a number of locations before his attack, including Disney Properties in abc, would not confirm the report, but says it has increased security measures across its properties in what it calls a world of uncertainty, david. Brian ross with us again tonight. Brian, thank you. We were on the air here today when the director of the fbi, james comey, revealed to the country that not only was this gunman interviewed three times by the fbi, hed be under surveillance for months, and undercover informants had been engaging with him so, we ask tonight, why didnt a federal background check alert the fbi teams who once had their eye on him . Heres abcs Pierre Thomas on that. Reporter today, the fbi facing tough questions. Could omar mateen have been stopped before his murderous rampage . I dont see anything in reviewing our work that our agents should have done differently. Reporter but why was the killer allowed to walk into this gun store and buy firearms, despite the fact that he had once before under fbi surveillance for nearly a year . With undercover infiltrating his life. The fbi says it never found hard evidence that mateen was really a terrorist threat. And they had hundreds of isis investigations under way. We are looking for needles in a nationwide haystack. Reporter terror investigators werent flagged when mateen walked into this gun store three times in the last ten days, legally buying a handgun and a high powered assault rifle. An evil person came in here he held multiple security licenses and he passed a background check. Reporter today, the president , frustrated critical information isnt being shared. If they do get alerted, sometimes its hard for them to stop them from getting a gun. And Pierre Thomas joins us from outside that gun store tonight. Pierre, why wasnt the fbi tipped off during the background check . It would seem to a lot of americans that there should have been a sharing of information here. Reporter david, there are very specific rules about how long the fbi can investigate someone when they dont find evidence of terrorism. And their limitations on sharing those files once an even inside the fbi. Today, we got no indication that these poll sills are changing. David . Pierre thomas with us tonight. Pierre, thank you. And we turn next here to the moms who begged for any information on their sons, in the aftermath of the massacre. And the young woman who was inside the club, an unknowingly documented her final moments. Heres amy robach. Reporter 25yearold Amanda Alvear, who took that ominous snapchat as the first shots were fired. Her last moment, hiding in the bathroom with her best friend. Thats the hardest part. I dont know if my sister suf r suffered. I dont know the if it was quick. I havent heard anything. Reporter christine leinonen, waiting an agonizing 24 hours in limbo to hear about her only child, christopher, before getting the news no parent should hear. Wants to be in. Reporter mina justice, whos son eddie was trapped inside with the gunman, sending those Text Messages. He said hes going to kill us. And that was it. Reporter today, learning he is among the fallen. Amidst the tragedy, alvears brother, brian, saying his sister would want to spread a message of unity. We should be unifying in love. Reporter brian says he released those very last snapchat images of his sister, because he was proud of her. He says, asomeone day had just lost nearly 200 pounds and she was out with her friends, doing what she loved, and thats how he wanted her remembered. David . Amy robach tonight. Amy, thank you. When we come back here tonight, we want your opinion. Two very different responses today. Donald trump and Hillary Clinton. Trump doubling down on his muslim ban. And Hillary Clinton declaring she has no problem calling it, quote, radical islam. But she did add something else. Also, the new headline about gun sales across this country. And the star of the blockbuster hamilton, taking that celebratory moment, and instead, honoring the victims from orlando. His very emotional moment on that stage, when we come back. A dvt blood clot. Er what about my wife. What were building together. And could this happen again . I was given warfarin in the hospital, but wondered, was this the best treatment for me . I spoke to my doctor and she told me about eliquis. Eliquis treats dvt and pe blood clots and reduces the risk of them happening again. Not only does eliquis treat dvt and pe blood clots. But eliquis also had significantly less major bleeding than the standard treatment. Knowing eliquis had both. Turned around my thinking. Dont stop eliquis unless you doctor tells you to. Eliquis can cause serious, and in rare cases, fatal bleeding. 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Great things are ahead of you when your health is ready for them. At humana, we can help you with a personalized plan for your health for years to come. Next tonight here, from orlando, the race for president in this country. The candidates responding to the terror here. Donald trump and Hillary Clinton with two very different approaches today. Trump doubling down on his muslim ban and Hillary Clinton declare, i have no problem calling it radical islam, but with an important ad. Heres abcs tom llamas. Reporter tonight, donald trump expanding his proposed muslim ban, saying the doors to the United States should be closed to anyone from certain parts of the world regardless of their religion. I will suspend immigration from areas of the world where there is a proven history of terrorism against the United States, europe or our allies. Until we fully understand how to end these threats. Different approach. Inflammatory, antimuslim rhetoric hurts the vast majority of muslims who love freedom and hate terror. Reporter trump portraying clinton as so scared, she wont even utter the phrase radical islam. And her continuing reluctance to ever name the enemy broadcasts weakness across the entire world. Reporter but today, clinton did say those words. Whether you call it radical jihad schism, islamism, im happy to say either. What i wont do, because i think it is dangerous for our efforts to defeat this threat, is to demonize and demagogue and declare war on an entire religion. Reporter david, tonight, we reached out to the Trump Campaign to get some more clarity on this expanded ban on certain immigrants, but there was no comment. Trump is standing by his statement tonight. David . Tom llamas with us tonight on the campaign trail. Tom, thank you. And when we come back terror in orlando. The list of victims. And the star of hamilton, taking the stage and then paying tribute to the victims here. 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Fortune ladies and gentlemen, here are the stars of americas game. Pat sajak and vanna white. Thank you, jim. Hey, gang. Oh, dont be alarmed, its only us. Thank you very much. See you later. Hi. Youre here weve been waiting for you. Get ready. Time for our first toss up of the night