evidence. there was a computer seized from his house. they're going to look and see whether he was going on the internet, whether he had an e-mail account. it doesn't appear he had much of a social media profile, which is a bit challenging. but given that he's an older gentleman. his girlfriend had a social media account. so they're going to look into that. he was a gambler, did he have significant gambling debts. there was a lawsuit thrat he filed against one of the casinos. was that an impetus. those are the nuggets that investigators are pulling up to figure out if that was part of his mind set. >> thank you so much. we're slowly learning more about those killed at the concert as well. >> we only know some of their names right

david muir tells us about them. >> we are learning the names of those who lost their lives. dana gardner, former high school teena cheerleader amy gomez. sonny melton, a tennessee husband and nurse on the right. he died while protecting his wife heather, as bullets rain the down on him. i felt him get shot in the back, she told reporters. among the victim, teachers, etd cational professionals. susan smith, an office manager in simi valley, california. manhattan beach special education teacher, sandy casey. her student in mourning. >> it was painful. a lot of pain in the campus. >> reporter: a police records

two las vegas metropolitan police officers were also hit. the sheriff emotional. >> one was critical. but he's stable. one of my officers was off duty, attending the concert and lost his life. >> reporter: and amidst the horror, we are also learning of astonishing acts of heroic bravery, huddling together, carrying the injured through the chaos to safety, using their own bodies as protection. >> many going over their wives or girlfriends to block them. >> reporter: michelle schmid, packing her car with strangers. >> i called my husband and told him i love him and my little girl in case i didn't make it. >> reporter: brian claypool trapped. >> police officers screamed, go, go. and i rallied everybody out of that room. he was determined. these girls aren't going to die. i'm not going to die. i'm going to get home to see my

this is not happening, not happening. >> we since found out some other victims' names. we're learning about carrie barnett, a member of the culinary team at disney's california adventure as well as denise burditus. >> anissa tonks. of course we're going to sadly continue to find out more and more names of people affected by this tragedy and we're going to rye try to focus in on them as well. coming up. >> intense commands made over the radio and what they found inside the hotel room. more from vegas, next. ♪ [joy bauer] two thirds of americans have digestive issues. m joy bauer, and as a nutritionist i know probiotics can often help. but many probiotics don't survive your stomach's harsh environment.

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new york's empire state building going dark in memory of the las vegas victims. the skyscraper is one of many iconic buildings to pay tribute to the victims in las vegas. >> in the meantime, we're getting a glimpse of the police response to the mass shooting. >> police closed in on the killer and tom llamas

on how that played out. >> shots fired from mandalay bay. >> reporter: as bullets rained down on concert-goers like hellfire, las vegas s.w.a.t. teams jumped into action to take down the shooter. >> i'm going to form a strike team, i need five officers on me. >> reporter: heavily-armed officers moving up the grass towe -- glass tower. >> reporter: careful of friendly fire. s.w.a.t. members advance. >> i have the hallway of the suspect's room on the 32nd floor. >> reporter: and right before they stormed paddock's room, this warning, just in case they're walking into an ambush. >> i need everybody in that hallway to be aware and get back. we need to pop this and see if we get any type of response from this guy, see if

if he's actually moved on somewhere else. >> breach, breach, breach. >> reporter: off that explosion, officers move in. >> we have one suspect down. >> is that room 135? >> that's affirmative. one suspect down in 135. >> reporter: and as he discover paddock's body, they also find his arsenal. >> multiple firearms. >> reporter: the mandalay bay hotel, such a massive resort, more than 3300 rooms. so how were police able to zero in on the 32nd floor? a retired lieutenant says police sources are telling him with all that gunfire, it created a lot of smoke that set off a smoke alarm that helped them zero in on the room of the killer. president trump is calling the massacre an act of quote, pure evil. >> he as well as

president and their wives called for a moment of silence. they talked about searching for some kind of meaning. and he admitted the answer don't come easy. he had a message as well pour the victims. >> we are praying for you. and we are here pofor you. and we ask god to help see you through this very dark period. it is love that defines us today and always will forever. >> president trump has ordered ha t that the white house flag and other flags at public buildings be flown at half-staff through friday. the president heads to puerto rico later today. >> what kind of reaction will he get, especially after he slammed the mayor of san juan. and we're pollifollowing the da other headlines on "world news now."

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you have the compassion and strength of a name, giving you the courage to enjoy the ride. carefirst blue cross blue shield. live fearless. people around the world paying tribute to the victims in las vegas, including those in paris, where

turned dark overnight. our coverage will continue, but we turn to other top stories, including the president visiting puerto rico. >> he called the mayor of san juan a poor leader after she blast blasted washington's response. >> as of this morning, only 5% of the island has power and more than half of puerto ricans still do not have access to clean water. about 9,000 people are currently living in shelters. facebook has turned over to congress thousands of ads that have been linked to a russian internet agency. most of them were viewed after the presidential election. 99% of the ads cost less than $1,000 apiece. half of them cost less than $3 each. and wall treat street is co off another record

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it cools on contact, and also keeps you 100% flake free. try head & shoulders instant relief. for cooling relief in a snap. the we're taking a live look at the las vegas strip, back now with a closer look at the survivors of the massacre. >> now many are wondering, how are people coping in the aftermath of such a tragic event. darsy spears has one woman's story. >> reporter: the sound was sweet and the mood light. ♪ a beautiful october night of song and celebration. >> we were just dancing and having a good time. it was just, everyone was happy. >> reporter: 28-year-old chelsea

abbote was right in front of the stage moments before the mayhem. >> everything went dark and that's when everyone really started screaming, because they realized what was going on. it was a constant, pop, pop, pop, pop. >> reporter: not the sound nor the images. >> i saw people from the right-hand side screaming and running, and everybody started running, and the shots were l d louder and louder. and the woman not too far from me got shot in the chest. >> reporter: people in the crowd were screaming for everyone to get down as shots rained from the 32nd floor at mandalay bay. >> everyone was help each other and laying on one another, and the cops were grabbing us. and one guy got me, and he was like, it's okay, run as far as you k the oncan. i could only think of my s

anthony. i was not going to die today, so much to do with my son. so i took off the other way. but i feel extremely guilty, because, you know, there, it happened so fast. i wish i could have done more to save those people's lives. >> reporter: and with that, chelsea battles with how to start recovering. >> i feel so blessed to be alive. and i just feel so bad for the rest of the people who didn't make it out. ha's definitely something ha i have to figure out how to overcome. >> that's what everyone's trying to do now is figure out how to overcome. the clarke county commissioner did set up a go fund me page. they have raised almost $3 million. we've seen mike tyson, florida

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this morning on "world news now." as one survivor put it, it was literally running for your life. new details now emerging from the mass shooting in las vegas, from those who ran from the terror, the officers who ran toward the shooter and the arsenal of weapons, as police investigate his past for a possible motive. plus, we'll look at how the world is reacting to this tragedy on this tuesday, october 3rd. from abc news, this is "world news now." we do say good morning on this tuesday. we're going to get right to it. in las vegas, the entire country, and the world for that matter, mourning the worst mass shooting in modern american hi