this is nig"nightline". tonight, church service turned deadly shooting. [ gunshots ] >> how one man now hailed a hero took down the gunman in seconds. >> i see myself as doing what needed to be done to take out the evil threat. >> inside the disturbing pattern of attacks in houses of worship. plus feel the beat. stealing the show with kygo, the world renowned deejay sensation bringing song after song to a higher love. the rare behind the scenes access. private jets to the

globetrotter. his rise to greatness starting with some sexual healing. but first the "nightline 5."

thank you for join is us. six seconds of who are error captured on camera.

a church service in texas descending into horror as gunshots rang out. a hero speaking out about the split second decision to put an second to evil. >> he said, drop it. and then all he did was pull out a gun and started shooting. and then they all surrounded him with guns, then they shot him, and all -- i heard like three shots. >> reporter: it is a scene no child should ever bear witness. [ gunshots ] >> reporter: tragedy shattering a peaceful sunday morning service. >> so like the gunman was like just sitting there for a good minute or two. and he was just standing there, and he -- gunman stood up and turned around to him. so probably like three feet away from my papa. >> reporter: chris wallace describing the horror when a gunman shot his grandfather, tony wallace, inside this church

near ft. worth, texas. livestream video capturing every moment. >> kind of like heartbreaking, but sometimes you got to be strong about it and just keep on going. >> reporter: his papa one of two parishioners killed this weekend. tonight new details on the shooter and the man who brought him down. now hailed as a hero for preventing a much bigge tragedy inside the west freeway church of christ. >> the citizens who were inside that church undoubtedly saved 242 other parishioners. >> reporter: this shooting joining the growing list of attacks involving places of worship, from charleston to pittsburgh. the problem appears to be growing. sunday's shooting was the second attack on a religious gathering in less than 24 hours. in a jewish community just outside new york city, a man stabbed five people as they celebrated hanukkah. back in texas, authorities identifying 42-year-old keith thomas kanaanen as the shooter. they say he has had run-ins with

law enforcement in the past but they have not figured out a motive for this attack. >> today evil walked boldly among us. let me remind you, good people raised up and stopped it before it got worse. >> reporter: video shows that it was 10:50 sunday morning when the shooter entered the church. >> i mean, the shooter was sitting next to my mother. she knew from growing up in the church that this -- she didn't recognize this gentleman. >> reporter: over 200 parishioners were in attendance, including 71-year-old jack wilson, a reserve deputy sheriff. >> we noticed that his right hand was visible but his left hand never was visible. so i'm assuming at this point that the shotgun was, you know, was in his pocket all the way up under his armpit, and he's holding it in place with his left hand. >> reporter: in the video you see the gunman wearing a dark hoodie sitting in the back pew. he gets up, walks to the back, and appears to say something to a deacon, then pulls out a long gun, aims, and begins to shoot.

the attack lasting just six seconds. >> that's a long six seconds. and a lot of things go down in six seconds. >> reporter: wilson was in charge of church security, pulls out his own gun, fires a single shot, kills the gunman before he can harm anyone else. >> active threats, 1900 south las vegas trail. >> reporter: cries amidst the chaos erupting. at least five other parishioners pulled out handguns and carefully approached the gunman. toward the back of the church, one man kicks away the suspect's gun and picks it up. all of it happening as parishioners duck in the pews and children run for safety. >> we're going to need help with a patient here. >> reporter: it was a sad thing that he had to come into the congregation and hurt people, and it was a sad thing that we had to hurt him. >> i don't feel like i'm a hero, i was doing what i needed to do to protect the people of the congregation. and i, you know -- in the same scenario, i would do it again.

>> reporter: wilson, who was a former law enforcement officer, also trained the church's volunteer security team. he says it is not just about having the gun, but knowing how to use it. >> my philosophy is, if you're going to wear a firearm for self protection of yourself and others, you need to be proficient. if you produce it what i tell the students in my classes, you have to be willing to use it if you produce it. if it doesn't stop the threat. and that's what i live by, that's what i teach. otherwise, there's no sense in wearing it. >> reporter: the heroism by wilson and fellow church goers ioliting the passage of a recent law allowing licensed texans to carry licensed weapons into churches. >> the highlight is they were able to immediately return fire and stop the suspect from killing other people. the downside is, you're really talking about shooting in a combat environment. and the problem with that is, even those of us who have been

trained to do that will make mistakes. so the big concern is, crossfire and shooting innocent people. you have to accept the reality that if those people aren't highly trained and know how to function in a combat crisis situation, you can have fatalities that were not intended. >> we have six ambulances en route. >> reporter: that law passed in the aftermath of the deadliest shooting in texas history, also at a church. killing 26 people. a gunman opened fire during the sunday morning service. my colleague matt gutman spoke with a survivor. >> when you're like this and you're covering your head, what are you thinking? >> i shouldn't have gone to church that day. he told me not to go. let's not go, let's just wait until next week. and i'm never going to see my grandchildren again, and i'm going to die. >> reporter: it wasn't until local resident steve wilford,

who was armed outside the church returned fire, that the gunman began to retreat. >> as he exited the church, a local resident grabbed his rifle and engaged that suspect. >> i'm no hero. i am not. i just wish i could have gotten there faster. >> reporter: while an autopsy reformed willeford did shoot the gunman, the attacker ultimately killed himself. >> two gunshot wounds from an armed citizen, one of those in the leg, the other in the tore go. >> reporter: at the time a concerned neighbor, but he has since become a member of the first baptist church he fought to protect. today he's headed to white settlement, texas, as a representative of that church. ♪ with my soul with my soul >> reporter: in solidarity with the residents grieving the violence and tragedy that tried to bring their community to a halt. tonight, behind closed doors, this church finishing the service that was tragically cut short on sunday, remembering

those lives they lost and honoring the brave who saved so many. for "nightline," i'm marcus moore in white settlement, texas. >> our thanks to marcus. up next, 48 hours with kygo. behind the scenes adventure with the powerhouse deejay sending fans to a higher level. ♪ ♪ oh, oh, oh, ozempic®! ♪ (announcer) once-weekly ozempic® is helping many people with type 2 diabetes like james lower their blood sugar. a majority of adults who took ozempic® reached an a1c under 7 and maintained it. here's your a1c. oh! my a1c is under 7! (announcer) and you may lose weight. adults who took ozempic® lost on average up to 12 pounds. i lost almost 12 pounds! oh! (announcer) ozempic® does not increase the risk of major cardiovascular events like heart attack, stroke, or death. there's no increased risk. oh! and i only have to take it once a week.

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[ dramatic music ]ing ] ahhhh! -ahhhh! elliott. you came back!

♪ you might not know his full name but you probably know his

music. kygo, one of the world's most popular deejays, now three shows in two countries. we're with the all-star for a rare glimpse into his life. here's "nightline's" ashan singh. >> let's go! ♪ >> reporter: we're at a pool party in vegas and whitney houston is blasting. >> "higher love" is my newest single with houston. she played that one live so it's an amazing feeling because everybody knows the lyrics, everybody sings along. i see all the smiles on everybody's faces when i play it so that's definitely a pretty good feeling. >> reporter: meet kygo, the man responsible for giving the late legend her most recent hit. ♪ bring me a higher love >> how did that come together? >> she was signed to the same label as i am, and they had this song laying around that she covered in 1990 or something. ♪ bring me a higher love >> of course it's so powerful,

whitney houston's like one of the most legendary artists of all time. to me it was kind of unreal to get the opportunity. >> reporter: it's a far cry from where it all began. a kid from norway with a passion for piano. now he's one of the most popular deejays in the world. from his residency in vegas to headlining a festival in toronto. and back. he gave us a glimpse of his life over one weekend. ♪ two countries. ♪ three shows. ♪ 48 hours with kygo. >> what's up, vegas! ♪ ♪ >> what's it like knowing that all these people are here just to see you? >> it's definitely -- it's definitely very cool. vegas is always a fun place to

play. it's always new people coming in every weekend. it's always -- always a good crowd here. >> how did you actually start becoming a producer? >> i got a mini keyboard, then i just used youtube tutorials. say like every time i didn't know how to do something, i just try, you know, figure it out on youtube, or just experimenting. ♪ >> reporter: about six years ago, he started remixing songs and posting them online. like marvin gaye's "sexual healing." ♪ >> i was looking online for new music, i was on sound cloud. and i came across, you know, kygo. i immediately hit him up on facebook. i reached out, hey, man, huge fan, love your music, love to

work with you. he basically said, yeah, let's do it, like right after a call. he was sort of, let's see what happens. kygo's real name is -- [ speaking foreign language ] that's how you say it in norwegian. i go with kygo. >> reporter: their partnership was a match made in heaven. before you knew it, they landed a record deal. >> i signed a deal and i released "firestone." >> when he signed that deal i just felt like it was game time. >> reporter: two years later he would release his debut album "cloud nine." what was it like to release original music for the first time? >> yeah, that was -- that was a good feeling. up until that point i was only doing remixes. i think actually some people -- i saw some people on the internet thought that my artist name was "kygo remix." because i was -- every song was

"kygo remix." >> reporter: now he's collaborated with some of the biggest names in music. rita ora. ♪ selena gomez. ♪ ♪ it ain't me ♪ we were high and we were sober ♪ >> reporter: and ellie goulding. ♪ we were young and now we're older ♪ >> reporter: it's just over 24 hours after a show in vegas and kygo's headlining at toronto's belt music festival. about 40,000 fans are waiting for him to take the stage. >> just trying to get into the zone.

>> i can't wait to show everybody what we got. >> how are you guys doing? ♪ >> who are some of your influences? >> it depends. in the electronic world, when i get into electronic music, avicci. avicci. when i heard his songs, i connected to them in a different way. ♪ all the time i was finding myself ♪ >> "wake me up" is the best song ever. ♪ so wake me up when it's all over when i'm wiser and i'm older ♪ >> i just knew that this is -- this is what i want to do. >> reporter: our weekend with kygo ends after 3:00 at a club

in vegas. he's still going strong. just another day in the life. ♪ >> the "nightline" documentary short on kygo is streaming now on hulu. on hulu. we'll be right back. relief. ot cit's pol ahhh vaporize sore throat pain with vicks vapocool drops and try new vapocool spray. quitting smoking is freaking hard.st, like quitting every monday hard. quitting feels so big. so, try making it smaller. and you'll be surprised at how easily starting small... ...can lead to something big. start stopping with nicorette sleep this amazing? that's a zzzquil pure zzzs sleep. our liquid has a unique botanical blend, while an optimal melatonin level means no next-day grogginess. zzzquil pure zzzs. naturally superior sleep.

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stop! there are a lot of ways to get a dui. and a lot of ways to go. text a friend. call a cab. share a ride. whatever you choose to do, go safely, california.

a drink with friends can turn into two.. and a prescription can be stronger than you thought. stop! there are a lot of ways to get a dui. and a lot of ways to go. text a friend. call a cab. share a ride. whatever you choose to do, go safely, california.

♪ and finally tonight, on the final "nightline" of the year, a special thank you to the team that brings the broadcast alive every night, our family. thanks for the company, america. happy new year. and good night.

♪ every day it's getting closer ♪ ♪ going faster than a roller coaster ♪ ♪ a love like yours will surely come my way ♪ ♪ hey, hey, hey ♪ every day it's getting closer ♪