Transcript for Orlando Massacre Survivor Says Officer Saved Him, New Details on Killer
To say it's been a nightmarish week for Orlando is an understatement. So many tragic headlines. We have our first look at the man behind the nightclub shooting and new stories of terror and bravery and inspiration. Here's Lindsey Janice. Reporter: New video from inside the Orlando night lub massacre. I ended up in the bathroom. The shooter started saying everybody is going to die. Reporter: Instead, Miguel says he and dozens of others hid in the stalls, huddling together. He says he made the video obtained by ABC station WPLG to send to his girlfriend. We were quiet and everybody's phone kept ringing. The only way to let our families know we're okay was just to record it and let them hear that we're trying to be quiet and send the video. Reporter: They hid for four hours. Some of them shot and bleeding. Trying to keep each other alive. One was shot twice in the leg but says he can't stop thinking of those that didn't survive. Half the people were in the bathroom with me. Reporter: And for the first time, the voice of the murder. Good morning. Reporter: Omar Mateen working as a security guard featured in this documentary called "The big fix" at the site of the BP oil spill. Everybody is just out to get paid. It's all about the money, right? All about the money. Reporter: Disgruntled, and his anger costing him his job at a Florida courthouse. There was a comment made about his allegiance to the fort hood shooter, and those comments brought immediate alarm to my staff and the super visors at the courthouse. Reporter: The incident triggering one of two FBI investigations, both showing he wasn't a threat. His ex-wife now says he may have been struggling with his identity. He could not be his true self- Reporter: Today the FBI turning its focus on omar Mateen's second wife trying to determine what she knew about her husband's plot. She hasn't been seen in public since stopping by her apartment Monday night. The evidence you find in the United States. We're leaving no stone unturned. We can't speculate on the charges or if there will be charges. Reporter: Sources say when the FBI obtained footage of her when he bought ammunition, she started cooperating. Saying she tried to talk her husband out of harming anyone. She grew up in northern California. Friends and family say she met her husband online. Mateen's father telling us he only has positive things to say about his daughter-in-law. She's a good housewife, good daughter-in-law to have. She takes care of our son always. Reporter: How close were she and omar? They were husband wife and having kid. Reporter: They share everything? They live together? They are a good family life. Reporter: This family seemed -- today one is safe in his mom's embrace. His room decorated with balloons and a picture of the friends he lost. I love you, mommy. I love you. Reporter: In this hospital bed, angel echoed the stories of other survivors, telling my colleague about the ruthlessness that Mateen had in his killing spree. He kept shooting. He wouldn't shop. The gunshots got closer and closer until he shot the girl next to me, and then he came up to me and that's when he shot me three more times. Reporter: Shot in the leg, the hand, and his behind because he made it out alive by laying dead among the bodies. I kept thinking I can't go like this. I can't -- there's no way I'm going to let this man take my life right now like this. Reporter: And when the gunman moved to another room, a lone police officer whose name he doesn't know, snuck into the club and quietly looked for survivors to rescue. He was yelling who's alive. At this point there were people still screaming. I looked at him in the eyes and I was like help me. He runs to me and he's like the only way that I can get you out of here the quickest is if I grab your hand and run. And I'm like, you can't carry me. He's like no. Grab me you and we run. I'm like all right. Let's go. He grabs me and turns around and starts running. I was very lucky that one cop was there. Reporter: On the campaign trail, presumptive nominees from both parties taking up the issue of gun rights and acts of terror. We do need to top terrorists from getting their hands on the tools to carry out attacks so easily, especially assault weapons, military style assault weapons that have no place on our streets. If some of those great people that were in that club that night had guns, you would have had a situation, folks, which would have been always horrible but nothing like the carnage that we all as a people suffered this weekend. Reporter: And the hospital in Orlando, angel has begun to heal. He's not able to walk quite yet, but says the outpouring of support has lifted him to be able to see beyond the horrors of last Saturday. I can't walk. I am moving my legs, though, so there's hope there that I'm for sure going to be walking again, but it's also unreal, the love that I've been shown these past three days. So just keep showing the love. Don't let people like this bring us don't. Don't let them ruin our pride, our community's pride. Reporter: For "Nightline," I'm Wendy Janice in fort pierce, Florida.
This transcript has been automatically generated and may not be 100% accurate.