seeing the effects of these body cameras during a heart-pounding pursuit. selena gomez,ick jonas, pledge. but this pride actually presented her father with a serf purity on her wedding day, even getting a doctor to sign it.. why the newlyweds are now getting blasted online. ters. and hello adele. eternity. now the beloved singer is back in full force with an instant hit. what's up with the flip phone? but first the "nightline 5." >> let's give these dayquil liquid gels and go. >> these are new. mucinex. >> it's the same difference. >> this is max strength and fights mucous. >> mucinex fast max. max strength and fights mucous. let's end this.

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>> number one in just 60 good evening. thank you for joining us we begin with a major reform for lapd where every single officer is you fitted with a body cam. will it be cops in check? abc's matt gutman is with them on the ground. >> reporter: lapd giving chase, careening ound a corner. we're with them. >> hands up! turn your back towards me!

hands on top of your head! lay down on your stomach! >> reporter: for officers parras are routine. the images you're seeing are >> thought he had a gun? >> reporter: over the past month lapd, which earned infamy with the rodney king video, becoming by far the largest police department in the nation to deploy body cameras on all its patrol officers, 7,000 of them. do you think this will change the lapd in any discernible way? >> i think it will change all law enforcement. first of all, the lapd is t the biggest agency that's doing this. but it won't be long before all cops will do this. this is going to become a common ece of equipment for law enforcement. really the question will be not if you have them, it's why don't you have them? >> stop, stop, stop! >> reporter: over the past years body cameras have been a hot-button issue thanks in part

to videos like these. this reserve deputyllegedly miststaking hi gun for his taser in oklahoma city. >> i sho him, i'm sorry, [ bleep ], [ bleep ]. >> reporter: the reserve deputy is facing second-degree manslaughter charges. he says it was a terrible accident. but perhaps the most publicized example -- >> stop, stop! >> reporter: an officer for university of cincinnati shooting to death samuel due pose during a traffic stop. the video revealing what the prosecutor called -- >> the most asinine act i've ever seen a police officer make. >> reporter: officer ray tensing told other officers right after the incident he needed to protect himself. >> i thought he was g going to run me ovever, he wadragging on me. he took off, my hand was caught inside. i missed the tires luckily but was getting drug by him. >> reporter: the video seems to show a different story. investigators concluded he was never dragged and never in danger.

tensing was fired from the department and charged with murder. despite these examples advocates say the cameras have probably absolved more cops than they have condemned. >> i think it sho that we believe in what we do enough to put it on film. and this allows that to happen. this is a camera. you can tell by this blinking light that the camera on. >> reporter: which is why the lapd is giving us an exclusive look at their new gear. the taser made axom. taser has seen sales surge over 154% in a year. more than 53,00000f these cameras are being buckled into police utility belts across the country still that's less than one camera per 10 cops in the u.s. we spent two days and nights with the lapd doing as they do. >> all units, code 4. >> reporter: filming every interaction with the public.

>> reporter: around midnight, h spots something in the darkness. he guns the engine. in pursuit of a suspected local gangng member. >> you thought he had a gun? >> yeah. >> reporter: there's a scramble in the alleyways to find him. until now their dash cams would chase. those new cameras now capturing frisk. close quarters contact that is often the source of complaints about excessive force. thisoung man knows what's coming. earlier this year the officers say he was charged with grand theft auto and the possession of a firearm. he doesn't pay us much attention. of your neck? >> darlene. >> reporter: while cuffed, artundia searches to see if a gun was ditched. both of them have significant others waiting for them at home. they do the toughest shifts in one ofhe nais nation's

toughestst beats. the mission division, aka gangland l.a. and skid row. made famous by thehe movie "end of watch." like those cops a decade of experience has honed an almost feral instinct about criminal activity and protecting themselves. they wear the cameras on their hips, near their guns. >> my personal preference for being on the belt, i want the video to catch the suspect's hands. not only that, but if we get into that situation where we are in a shooting, i don't want my hahands blocking the suspect's. >> you can't be here and your hands be blocking. >> right. how you're wearing it, your hands would be blocking the suspect. >> is it helpful for you? >> it's only been a week, too early to tell. >> reporter: the videoaptures very little. mostly blackness as we race on a code 3. to what they know will be a prank call.

to a flophouse, knowing the officers will soon turn back around. they worry with police officers feeling under increased threat, when the real thing happens when their life is on the liline, the camera will be a potentitially dadangerous deadly distractn. >> what if there's an a active shooooter in fnt of me and i'm thinking about in instead of my gun? that's the only issue i have right now with this. >> reporter: another concern, it might not always give a complete picture. in some ways that makes this the product incomplete. gives you only that one snip pent of time. >> one piece of the puzzle. it's a big piece. in some cases it's going to be a huge piece. in other cases it's going to be a smaller piece. it totally depends on when it's activated, what the angle is, where the individual's standing. >> reporter: lapd believes the cameras could protect its officers in the field and in court. and a couple of days before we interviews chief beck, reembedded with another unit that shot a man believed to be armed. >> dealing with the public, will we be able to s that? >> if presented in court it

becomes part of the public domain. >> reporter: that m means the public and media will have to wait. it's end of watctch. artundia and spalenka dock thr cameras, grateful a relatively uneventful night means they won't have video to review. matt gutman in los angeles. next,, the publicly declare their marriage vows and their chasty. then this couple found unexpected infamy online. plus a belle says hello again and immediately gets a question in response. why does her shiny newew music video feature an ancient flip-phone? i sure had a lot on my mind when i got out of the hospital after a d blood clot. what about my family? my li'l buddy? and what if this happened again? i was given warfarin in the hospital

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big moment went viral, igniting a firestorm of criticism. here's my "nightline" coanchor juju chang. >> reporter: we've all heard of purity balls where young girls promise their dads they'll remain virgins till marriage. 22-year-old brieland bowman took it one step further. presentation -- >> reporter: surprising her father, a pastor, with a framed >> i am really excited. because i went to the doctors. and i got checked out. and my hymen is still intact. >> reporr: showcasing her chastity in front of her 600 wedding guests. >> i really wanted to prove to hihim at ather level, dad, your word is good and my word is good and we did it. >> for her to be able to accomplish something, especially in this society where it is so

sexually driven, it was an exciting moment. >> reporter: the document signed by brieland and her doctor reading in part, to show h i have honoreded god a my earthly father in my body by maintaining my pupurity." >> even though it was something presented to her, it was still her choice to decide to sign it. it wasn't like it was something that she was forced or made to do. >> reporter: her husband, 28-year-old tim bowman, says he was also a virgin until marriage. >> just to say that i was the first person to be with her and vice versa, i think it's just something that's special. >> reporter: when he takes to the mike about h purity, a slightly different reaction. >> i was worried about seeing there was no way they could verify -- there was no test they could run on me. you got to take my word for it. ta to it the bank. >> there's a double andard here.

right? it was really unimportant. whereas women's virginity, it really gets very deeply wrapped up in whether or not we think that young women have value. >> reporter: the couple w who dated for three years admits it wasn't always easy. >> i've dated people andot in situations where i've come close to not doing what i said i was going to do -- >> i don't want to hear that. i don't want to hear that. >> reporter: the newlyweds honeymooning in dubaihen brieland's online posts about viral. >> our phones blew up. whoop! >> we looked at each other. nasty. >> very nasty. mmenting. one writing, why on earth is she presenting such a certificate to her father? another saying, how sexist is it that we're giving women away to prize? where is his certificate? >> the idea that the most

whetr or not she's engaged in any particular sex act is insulting and dehumanizing for women, when we scratch the surface of it. >> reporter: brieland's husband says the negativity didn't shake their faith. >> to see people support and people have issues with it i think is an empowering thing. it's getting the conversation started. >> reporter: it's not just public ceremonies pusng celibacy, sometimes it's public personas. nick jonas was famously chained to his purity ring. youou g me in chains >> reporter: but it didn't work out. williams. >> nick? >> yes? >> are you still a virgin? >> okay. just asking. just to be clear. taking off the ring couldean you're not a virgin or you're contemplating. >> no, i'm an adult in all ways, comfortable with who i am. >> repororter: sela gomez ditched her purity ring. and long before the wrecking ball, mylie cyrus had a chastity

promise. >> i hope young people who are paying attention learn the right lesson which is that these abstinence pledges do not keep anyone from having sex, right? these celebrities put them on, then when they feel like having sex, they take them off. >> reporter: according to one study chastity pledges are just as likely to have premarital sex as nonpledge is where they do have sex they are less likely to use protection and birth control methods. >> this is just a reminder, keeping yourself pure is impoant. >> reporter: last year "nightline" visited caroline johnson just before her very own purity ball. >> one of the things that you were talking to daddy about was when am i going to get my purity ring? and one of the things that i think's important for us to remember is this is your desire to do it the lord's way, to really save yourself from kissing lots of toads along the way and wait for your prince charming to come along. so weep that on your finger and it's a daily reminder that at this point you're married to the

lord. and your father is your boyfriend. >> reporter: pledging to her father to not even kiss until her wedding day. >> get ready to dance the night away. >> fathers, stand wit me. will you stand together in this accord? >> reporter: 60 like-minded fathers pledging to protect their daughters' vows. >> what i hear from young ladies is, there's this need for that physical touch. and om a male being. that's what i believe the father role is. >> let's take those covenants in the e middle o your table. i choose before god to cover my daughter as her authority and protection in the area of purity. there's a pen in the middle of your paper, pick that up and sign that. then have your daughters witness that. >> reporter: it's an event to remember. a public declaration of chastity. > these vy public rituals, it's a way of evangelizing, a way of saying, this is the standard we should all adhere to. it's a way of trying to me it

a cultural standard. the trouble with that is, there's no one size fits all approach to sex. >> reporter: as for the bowmans? >> i i couldn' be any more happy, more proud. my wife is amazing. >> reporter: they have one more public declaration. >> we're not virgin anymore. >> reporter: for "nightline" i'm juju chang in new w york. and next, say hello to singer ade. after going on hiatus for years, it looks like she hasn't updated her phone since then either. [tires squealing] charged up.

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tt2watv# 1t bt@qu?8 finally tonight, pop stars make all kinds of curious artistic choices in their music videos. but tonight, while many of us are celebrating the new emojis on our iphones, adele is making head lines for a decidedly retro move. hello it's me >> reporter: with the simple hello, your favorite shouldeder to cry on is back. multi grammy winner a adele dropping her first full music video in years. seem to be home >> reporter: adole has been low-key since having a baby. she spoke to bbc radio 1 about the anticipation of a new album due in november. >> the only reason that people seem to react like how you're saying they are is because i haven't done anything else.

i have been doing other things. i haven't been sitting around. >> reporter: making history as the first music video to be shot using imax cameras, six minutes of classic adele, a soaring chorus, a troubled relationship. adele looking to the camera, looking into your soul. the video reaching n nearly 2 million views in just one day. >> it's already happening! >> adele's music is too beautiful! >> reporter: videos celebting the emotionall effecter music never mind i'll find someone like you >> reporter: what's with all those flip phones and that videdeo? e director, zauf xavier dolan says newer phones are too identifiable with everyday lives, as soon as you film these elements it's like you'r shooting with every commercial. i find thehem tbe nonnarrative in the meantimes.

timeless voice. when i call you never seem to be home >> it was the incomparable ella fitzgerald who said, the only thing better than singing is more singing.

good night, america. >> the "insider" from hollywood, your 24/7 celebrity conversation. don't hang up that phone, adelle is back. >> she's not the only beautiful mom on top. queen b wins her xo lawsuit, carrie underwood confesses everything. >> we've all been peed on. >> but then, it's not called blood, sweat and tears for nothing. >> new york housewife sounds off on her yummy lawsuit zblichlt want the brands to be around a lot longer than i am. >> and parra normal activity begins. >> they help us investigate. could it be real? >> there is some truth to what