this is "nightline." >> tonight, it started with a fender-bender and ended with the shooting death of former nfl star will smith. was it road rage or was there a different motive? plus imagine someone who's the spitting image of you but you're not a twin and that identical face belongs to a complete stranger. the doppelganger detective bringing them together. the so-called trial of the century still making headlines. the man who may have held the key to o.j.'s fate speaking out about why he says marcia clark was not the right choice to go up against the dream team. but first the "nightline 5." >> if your family outing is magical for all the wrong reasons, you may be muddling through allergies. try zyrtec for powerful allergy

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good evening. thank you for joining us. it was a minor traffic accident that turned deadly. was it a case of road rage that quickly escalated into gunfire and ended with the death of a beloved super bowl champion? police say the men were total strangers but as abc's ryan smith reports, some say there may be an eerie coincidence. >> reporter: tonight police piecing together the story

former nfl star. >> will smith will get carson palmer -- >> reporter: known for wreaking havoc on the field, will smith, new orleans saint defensive end, helping carry the saints to a super bowl win in 2010 -- gunned down in his car late saturday night. >> there's a male down with about six gunshot wounds to the chest. >> reporter: his wife raquel in the passenger seat caught in the gunfire. >> please god help me! >> reporter: in this new cell phone video from a witness at the scene, smith's wife can be heard crying out to the first responders. >> i need an ambulance, my leg has been shot! >> reporter: police say it started just before midnight when a hummer rear-ended smith's mercedes, forcing him to hit the car in front of him. the routine traffic accident quickly escalated into deadly violence.

smith allegedly exchanged words with the driver of that hummer, 28-year-old cardell hayes, before hayes allegedly drew his handgun and shots were fired. police arrived to find smith hit in the torso and back, dead at the scene. >> while this was an isolated incident, it is certainly tragic at every level and on all sides. >> reporter: but was this an isolated incident of road rage? details quickly emerge of a bizarre twist. turns out hayes, the alleged shooter, once received a settlement from the city for the 2005 police shooting death of his father, anthony hayes. in an eerie coincidence, smith had been enjoying dinner that very evening with one of the police officers named in that lawsuit. and the street where hayes allegedly shot smith, only about 500 yards from where his father was killed by police. all of this raising the question, was it road rage? revenge? or just a remarkable set of coincidences? >> mr. smith and

complete strangers in all of this before that incident? >> to put these rumors to rest, my client didn't know mr. smith, my client wasn't friends or associates with mr. smith, my client never worked security for the new orleans saints. >> reporter: hayes' attorney john fuller offered a new theory, giving the public a peek at the defense strategy. >> multiple witnesses have told me that someone besides my client and his friend were behaving in a threatening nature out there on that night. and the police department knows this. >> are you saying your client felt threatened by the presence something smith had or someone in his party had? >> everybody out there felt threatened. >> by smith? >> by someone other than mr. hayes. this was not some situation where my client hunted down mr. smith. >> reporter: fuller also claiming hayes himself had been the victim of a hit and run moments earlier and was pursuing that driver when he collided with smith. the police did not address the theory saying only this -- >> at this time, we do not have any information to suggest that they knew one another

this was anything other than an accident that turned into a dispute, disturbance, that turned violent. >> reporter: in other words, smith may have been just another victim of road rage, something that accounts for almost 380 fatal crashes and more than 400 deaths across the country. in los angeles, tampa, and this one in james city, north carolina, where road rage hit dramatic extremes. a couple, bradley and christie turner, driving a toyota suv, allegedly cut off by a chevy pickup. they chased the truck for 30 to 40 minutes before turner confronted the three young men in the vehicle, throwing the first punch in a brutal fight. turner's wife comes out of the car and hands him a pistol and he uses to fire into the back of the truck. fortunately no one was hurt and the couple turned themselves in to police. this past february, bradley turner pled guilty to weapons charges. >> i think we all have the potential to be

i think some people get out of control. >> reporter: robert nimeroski is a psychologist in sfroon who's made a career of studying road rage. >> we get into a cocoon in our automobiles and we feel like we own the space in front of us. when someone tailgates us or cuts in front, i think that feels threatening, almost as if someone is driving into the front door of our home. >> reporter: he says there are ways for drivers to prevent road rage and cool off when things get too heated. >> you're feeling stressed, do something like go to the gym, go for a walk, get yourself calm. when you're in the car, instead of listening to maybe outrageous talk radio, maybe listening to something that makes you a little more calm. when something happens on the road and you start to feel yourself getting upset, use this mantra, fido. forget it, drive on. >> reporter: this means no yelling, no cursing, and laying off the horn. if you do find yourself in a confrontation, remember to stay calm, offer a quick "i'm sorry." it's not easy but it will go a long way in

dangerous situation that may have led to will smith's death. in new orleans today, smith's alleged shooter cardell hayes facing charges of second-degree murder in custody after failing to reduce his bail of $1 million. we're also learning new details about hayes. a football player like smith, he had been on the practice squad for the new orleans voodoo. marlon favorwright, who played for both saints and voodoo, knew both men. >> i heard about will's death on saturday night and i woke up the next morning, i saw a picture of has hayes. man this really can't be real. he are he'd never strike me as a trouble-making guy. i know he's big, dread locks, but he's a teddy bear. as far as i know he's left side been a nice guy. so that's why i was very shocked that this happened. >> reporter: it could be months before we learn the full story of what happened to smith. in the meantime, residents continue to mourn the loss of one of their own. >> it hit close to home.

>> reporter: smith was one of those rare players who stayed with one franchise, earning the loyalty of local fans like cardinals player tyrann mathieu who called fox sports radio -- >> he was a hero to us, he was a god in my eyes. >> reporter: kim kardashian, friends with smith's wife raquel, paying tribute, writing, will, you were an angel to your family on earth. the fan favorite will be inducted into the new orleans saints hall of fame later this year leaves behind three young children. his family in a statement asking for privacy as they "grieve the loss of a devoted husband, father, and friend." for "nightline," ryan smith, abc news, new orleans, louisiana. next, which one is the real kim kardashian? and that's not bradley cooper. the bizarre doppelganger phenomenon. how to find your

but first, the people versus o.j. simpson bringing back memories of the real-life cast of characters. shining a light on new sides of the story. >> if it doesn't fit, you must acquit. >> now former l.a. district attorney gill garcetti with an explosive admission, speaking out about how things should have been done differently at the o.j. trial, telling the "new york post" that prosecutor marcia clark wasn't my choice, i didn't pick her. the former d.a. going on to say that clark didn't pay attention to the clitrial consultant and chose african-american women despite being advised not to. she didn't listen and once she did that there was no chance we'd get a guilty verdict." according to the "new york post" garcetti said clark lobbied to take the lead and an emotional clark was no match for simpson's dream team. tonight clark responding telling abc news that it was garcetti's decision as to who should lead the case and it's absolutely untrue that i wouldn't listen to the jury consultan

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have you ever been told, i know someone who's a spitting image of you. might just have a doppelganger out there somewhere. a person, a stranger, who could pass for an identical twin. there's a way to help you find out. here's my "nightline" coanchor juju chang. >> are you two twins? >> reporter: meet maddy and amber. the pair look like twins. but believe it

>> no, we're not. >> no, you're kidding me. >> reporter: they're doppelgangers, a mysterious phenomenon in which two people look nearly identical. sometimes they're entirely unrelated. who can forget these bearded redheads who randomly found each other on the same plane? this photo of a mom and her twins sending viewers into confusion. turns out the mom is on the left. even celebrities like kim kardashian seeing double. >> my, i'm mike katzenbach, the bradley cooper doppelganger. >> reporter: he was confused for the actor at sundance. folklore has it that we each have seven look-alikes out in the world. >> louisa and i got in touch -- >> reporter: maeve, dublin native, is working to prove that theory. she's already met three of her own doppelgangers. >> oh my god, this is crazy. >> repor

meet-up went viral and has now been viewed more than 8 million times. since then maeve's become a doppelganger detective of sorts. cofounding the website twinstrangers.com to help others in their search. >> i think people want to find their twin strangers out of curiosity. it's not a burning desire to find someone who looks like you, it's more like, oh, yeah, that would be interesting, that would be fun. >> how many matches have you been able to make? >> so we have over 1 million people registered with the website and it's growing every day. we have thousands of matches. you put in your user name and whatever -- >> reporter: she shows us how the matches work. >> this is twin search. so these are all the people who have selected the exact same facial features. >> i see. >> and then if i like someone, i can pick them -- >> i'm from sweden -- >> reporter: nimah's bringing people together from all over the world to meet face-to-face.

twinstrangers.com a month ago. >> reporter: shannon from ireland. sarah from sweden. >> hi! >> oh my god. >> so nice to meet you! >> nice to meet you. >> oh my god, you look so like me. my twin stranger. >> reporter: and here in the u.s., ambra and jennifer meet for the first time in houston, texas. >> i love it. >> why did they bond so quickly? >> twin strangers bond very quickly because they're looking at a face they've been looking at their whole life. it's familiar to them. >> i live in tacoma, washington -- >> i'm amber from perth, western australia -- >> reporter: we wanted to see the doppelganger bond up close and personal. "nightline" paired up with twinstrangers.com to go behind the scenes of one of their meet-ups. brigham bear from perth, australia, and maddy from tacoma, washington, together here in l.a. and when we met in person, even i was confused. >> hi. >> hi, how are you? hi!

you're like double trouble. nice to meet you. >> nice to meet you, i'm amber. >> maddy. >> amber, maddy, you guys are adorable. >> nice to meet you. >> whose idea was the purple? >> maddy's. >> me. >> i want to know the first reaction when you saw the photo of each other on the site. >> i never really met anyone that looked like me. so seeing her picture's kind of weird. that was the first time i'd ever seen anyone that even looked remotely similar to me. >> much less a dead ringer. >> yeah. they sent me a photo of maddy to ask if i thought we were similar or anything and the kind of top half of the face started loading and i thought it was a picture of me. then the rest loaded and i was like, wow, that's insane. >> what did you guys first say to each other when you first met? what was that like? >> it was -- nerve-racking. but very exciting. i feel like i'd already known maddy. so yeah, i was just really excited to finally get to meet her. >> what piqued your curiosity? there ar

people thinking, i would never want to meet somebody who looks like me. >> i thought it would be fun, see if there's someone that's out there. >> fun, not creepy? >> right, yeah. >> yeah, i thought it was fun. >> were there any freak-out moments? >> there's been moments where we go to do the same thing at the same time. like swipe our hair at the same time. take a bite of our food at the same time. >> just before eating together everyone freaked out because we ate something the same way. >> i just feel like -- i don't know. with other people, it could be awkward to hang out with some girl for a weekend. but i feel like it's -- >> i feel like i've known you pretty much my whole life. >> it's very comfortable the whole time. >> like twins separated at birth? >> yeah. >> maybe. >> tell me what you do for a living, what background you've had. >> i cut hair for a living. >> i did learn some makeup in cosmetology school. that's what she does. we graduated the same year out of that. >> it would be essentially the same school on different sides of the world. >> you have a similar laugh.

>> don't do it. >> reporter: they've spent the weekend together sightseeing in l.a. their boyfriends tell us at times even they've been confused. >> and you guys look like twins? >> absolutely. we're like related almost, it's crazy. >> what was your reaction, gut reaction? >> well -- first thing, oh, crap, you've got to be kidding. >> yeah. >> went up to hug somebody, oh, wow. >> you've got to really know. from behind you can't even tell. >> you have girlfriends who look identical. what does that say to you about how much we have in common with our fellow man? i don't know, as global citizens? >> you know, it's -- it's pretty cool. at first it was all about the looks. but then after hanging out with them for a few days it's more than just the makeup, it's more than just the hair, it's more than just them. they start doing things in unison. and it's kind of like, okay, stop. right? are you doing that on purpose? >> you had them dye the

of that? >> you're not looking at the hair anymore, you're looking at the facial features. you're not pointing out those differences, you're focusing more on the face. that's the point of it. >> reporter: we wanted to see if there's a genetic reason for their similarities. we asked amber and maddy to take a dna test that ancestry.com agreed to process for free. in just a few weeks the results are in. and guess what -- they are 100% not related. but they do have similar european roots. despite the results, they say their newfound bond will only grow. for "nightline," i'm juju chang in los angeles. and next, the magical moment that has the internet smiling. for a limited time, you can get a great deal on this passat. wow, it looks really good... volkswagen believes safety is very important... so all eleven models come standard with an intelligent crash response system...

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finally tonight, after a fuzzy first few months, one bright-eyed baby boy is seeing the world so clearly now. pretty incredible moment. the video first appeared in "the daily mail." here's abc's john donvan.

>> reporter: his name is leo. he's 4 months. leo, who has a rare disorder affecting his vision, had never had a good, clear look at the world. >> most of what he's been able to see up until getting the glasses was extremely fuzzy or completely out of focus. >> reporter: so the glasses were there to fix that. the video, which has gone viral with more than 1 million views on youtube, it's the moment leo first puts them on and first looks straight into his mom's face. and there's that moment of recitati recitation. and then, there it is, leo obviously likes what he sees. >> that smile is something that was so different. for me to see. >> reporter: for "nightline," i'm john donvan in washington. >> how sweet is that. it was nelson mandela who said there can be no keener revelation of a society's soul than the way in which it treats its children. thanks for watching abc news. tune into "good morning america" tomorrow. as always we're online 24/7 on our "nightline" facebook page and abcnews.com.

hey. hey. help my mom with the bags, huh? hello, raymond. oh, hey, hey, let me get that for you there...mom. oh, raymond. i have to say, i just love hearing you calling me that. ( laughs ) yes, ray, i heard. very sweet. i'm just going to go check on the kids.

look, ray. i bought the doughnut holes you like. don't show debra. ah, chocolate! thanks, mom. hello, marie. hi! hey! hi! whoa! didn't hear you. gonna tie a bell around your neck.