him and said, oh my god, he did it. >> i just remember screaming. >> probably the scariest moment my entire life. >> it was physically painful. it was not justice. the murders took only minutes. all these years later, the shock has yet to fade. >> it was a stunning time. and american legal theater. >> you think you might know the story of the oj simpson case, but there's a lot you probably haven't heard and seen. did nicole brown simpson actually predicts her own death? >> what she said to us was that oj is going to kill me. and he's going to get away with it. >> what went on in the jury room? >> not guilty of the crime of murder. >> all the people wanted to do was go home. >> in a frank interview prosecutor marsha clark answers the most important question of all. how did you not convict this guy? june 12th, 1994. brentwood, california. two horrific murders that came to be defined by just three words. the oj case. >> everybody seen a dramatic scene in both victims had their throats/. >> i have og in the car. >> we have sufficient evidence to convict him. >> how about that. >> if it doesn't fit you must acquit. >> not guilty of the crime of murder. >> it was a story that wouldn't go away. if you lived it, and by here with me the united states, you had an opinion. a nation made new in its collective consciousness for this collision of pop-culture and legal drama. more than a quarter-century ago, it touched issues we still cannot agree on today. race, money, privilege, fame, interracial marriage, and domestic violence. this became televisions first reality show. the case consumed us. and then divided us. even now, we are so fascinated. because there are still questions about what really happened that night in brentwood. and why, despite a staggering amount of evidence, oj simpson was acquitted. we will provide some answers with interviews done over the years. rare footage and haunting memories. including a candid interview with prosecutor marsha clark who doesn't hold back when discussing her unique perspective on the case. on everything from the infamous bronco chase. >> i think we look like the biggest ever. >> to the trial of the century. >> every day we walked into court and something else was blowing up. a bank not guilty of the crime of murder. >>, of course, the verdict. >> i do. >> it was a cool late spring evening in brentwood. around midnight, a couple was walking a dog down a quiet section of south bundy drive when something strange caught their attention. then at the entrance to a condominium number 875 they saw it. anybody in a river of blood. police arrived and discovered a second victim. investigators would soon follow including veteran homicide detective tom lang. >> this isn't a robbery or for sex, this was a rage killing. nicole was nearly decapitated. >> nicole was 35-year-old nicole brown simpson. the ex-wife of o.j. simpson. near the bodies was a bloodied leather glove and an envelope with a pair of eyeglasses. an eighth blue cap. c.o.p.s later i.d. the male victim as 25-year-old ronald goldman. at this point they did not know much about him. >> there were numerous wounds on the neck. he put up a fight. >> asleep inside the house for the simpsons two children. who hadn't heard a thing. they were taken to a nearby police station. >> we need next of kin to take care of the kids. we need to find o.j. simpson. >> is don broke in brentwood, lange and three other detectives were sent to simpson's estate on nearby rocking him avenue. one of them was detective mark furman. a riving detective sheared the worst that simpson may have suffered the same fate as his ex-wife. >> we just left a bloodied crime scene. is something in there as one of the victims? >> so, without a search warrant, the detective jumped the wall and let in the other cops and in one of the bungalows they found simpson's 25-year-old daughter arnel. they learned her father was out of town on a business trip in chicago. in the other bungalow, detectives woke up a shaggy haired young man named brian "kato" kaelin. he was about to start on the role of his life answering questions where he had last seen simpson. >> iser earlier in the day and was talking about him and problems. he needed someone to talk to and i was probably the only guy available. >> later that evening, he said simpson came by his door to get change for a one-hundred-dollar bill mention getting something to eat. so just after 9:00 p.m., they hopped and simpson's bentley went to mcdonald's. did simpson ask kaelin to with them to establish an alibi? >> i invited myself. he did not ask me. i was starving. >> kaelin told detectives they got back around 9:40 pm and he returned to his bungalow and did not see simpson again for approximately an hour and a half. then around 10:45 p.m., kaelin says he heard three strange sounds. >> it was a banging noise. someone bumped into a wall. >> he came outside to check on the noise and saw a limo driver at the gate. waiting to take simpson to the airport. a few minutes later, simpson came out of the house, his luggage was loaded in the limo sped off. kaelin stories seem to add up. so now it was simpson that the cops wanted to talk to. he was in his hotel in chicago when the detectives told him what happened in l.a. >> there were no details given except that nicole was dead. he said, i will be on the next plane back there. >> came another phone call, one tom lang dreaded. notifying nicole's family. >> you hear the phone rang and i hear a scream from my mom's room that i'd never heard before and it was just awful. awful. awful. >> denise brown, nicole's older sister, remembers rushing to her mother's room. >> she says, your sisters did. and i said, oh my god, he did it. he killed her. >> hate being o.j. simpson. then he says former brother-in- law. detective lange was stunned at this sudden new lead. >> that was my first inkling that perhaps simpson was involved in this. >> nichols' family devastated in an instant. continued the grim task and called her best friend kris jenner. >> i was like, what? what do you mean nicole die? and he was like it was devastating. i think -- it was the worst feeling you could possibly imagine. >> she had no nicole since 1978. they met through her former husband robert kardashian who was simpson's best friend and attorney. she adored him, too like a big brother. >> he was very charming a lot of fun to be around and you could tell he was the type of person who really enjoyed life. >> they have become fast friends. and the two couples were like family. now, all of that was suddenly gone. >> everyone's life change. nicole died. and nothing would ever be the same. >> the world had changed forever for kris jenner and the radical move families and for o.j. simpson. who would soon be back home in l.a. where a trail of evidence led right to his front door. >> coming up, someone else's world but also about to change. a deputy d.a. named marsha clark. >> do you know who it is? o.j. simpson. who's that? oh wait. yeah, naked gun, hurts commercial. >> you are a big football fan? >> i was not a big football fan. but i did know now. >> when "dateline" continues. and with once-daily trelegy, it can still be beautiful. because with 3 medicines in 1 inhaler, trelegy keeps my airways open for a full 24 hours and prevents future flare-ups. trelegy also improves lung function, so i can breathe more freely all day and night. trelegy won't replace ue inhaler for sudden breathing problems. tell your doctor if you have a heart condition or high blood pressure before taking it. do not take trelegy more than prescribed. trelegy may increase your risk of thrush, pneumonia, and osteoporosis. call your doctor if worsened breathing, chest pain, mouth or tongue swelling, problems urinating, vision changes, or eye pain occur. ♪ what a wonderful world ♪ [laughing] ask your doctor about once-daily trelegy for copd because breathing should be beautiful, all day and night. a slow network is no network for business. because breathing that's why more choose comcast business. and now we're introducing ultimate speed for business, our fastest plans yet. we're up to 12 times faster than verizon, at&t, and t-mobile. and existing customers could even get up to triple the speeds at no additional cost. from the company with 99.9% network reliability and advanced cyber security, it's ultimate speed for ultimate business. and it's all from comcast business. - [narrator] life with ear ringing sounded like a constant train whistle i couldn't escape. then i started taking lipo flavonoid. with 60 years of clinical experience, it's the number one doctor recommended brand for ear ringing. and now i'm finally free. take back control with lipo flavonoid. in 1994, the city of angels was about to get an education. in 1994, the city of angels was about to get an education. back then, most of us had never heard the name kardashian. today's powerful bond between dna evidence and criminal guilt didn't yet exist. and the name o.j. simpson belong to a friendly recognizable sports star, after and corporate ambassador. someone the nation new, trusted, and liked from his naked gun movies to his nfl broadcast, as his colleague bob costas remembers. >> he was always the quintessential fellow well met and was outwardly as likable a person as you could ever want to encounter. >> on day two of this story, much of that history was in the process of being rewritten. the brentwood crime scene was now crawling with cops looking for clues and collecting evidence. blood was everywhere. leading from it, a trail of blood he shoe prints. near the bodies was a left-handed glove and a blue knit cap. and inside the walls of his rocking him estate, detective mark furman but behind kato kaelin's bungalow and discovered a moist body glove. similar to the one at the crime scene. >> we look at the glove and it looks like the same type and it was a right-handed club. same everything. >> detectives also found a trail of blood drops on simpson's driveway leading from the white ford bronco parked on the street. lange braced himself for what was to come. >> this is very sensitive now. it is a celebrity case. >> at midnight last night, a passerby observed the body. a female white body and a male white body. >> the district attorney marcia clark was with the special trials unit and was consulted about getting a search warrant or rocking him by tom lang's partner detective then matter who considered simpson assessment. >> do you notice? o.j. simpson. who's that? oh, wait. oh, yeah, naked gun. hertz commercial. i wasn't a big football fan but i know who he is now. >> sound 13 hours after the murders, simpson returned to l.a. from chicago. a journey that took him from household name to potential suspect. you never thought of him as a killer? >> no. to me, he was bigger than life and had a great personality. he loved, you know, being o.j. simpson. >> bad enough that simpson might be involved in the murder of her best friend, but now kris was further conflicted because her former husband robert kardashian was simpson's longtime personal attorney. kardashian was also at rocking him and was caught on camera carrying what appeared to be since his garment bag. much has been speculated about what might've been in that bag. could you conceive of him loving his friend so much that he would help him dispose of evidence? >> absolutely not. i guarantee you 150% that he had this character and integrity and christian values and believed in the truth. >> detectives now wanted to bring in simpson for questioning. his attorney said his client would fully cooperate. >> is shot and had nothing to do with this tragedy. >> after arriving at police headquarters, simpson's lawyers met privately with him and then went to lunch. leaving the client alone which is get veteran homicide detectives. >> i was flabbergasted. unless he thinks he is glib enough he will say anything he wants and get around this, -- >> detectives that o.j. simpson settled into a small interrogation room for a critical interview that could make or break the case. it would be the first and last time simpson would tell his story to police. >> coming up. >> i am the one, the number target and i know you're telling me i've got to is that your blood? 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it's time to wake up. because shingles could wake up in you. if you're over 50, talk to your doctor or pharmacist about shingles prevention. hi, i'm jason. i've lost 228 pounds on golo. ♪ if you're over 50, talk to your doctor or pharmacist changing your habits is the only way that gets you to lose the weight. and golo is the plan that's going to help you do that. just take the first step, go to golo.com. parker center in 1994, police headquarters in downtown la. in 1994, police headquarters in downtown l.a. it has seen a lot of high- profile murder investigations and thousands of interrogations, and on that june afternoon, perhaps no more pivotal than the top detectives were about to happen with o.j. simpson. simpson did not have to be there. he wasn't under arrest. and his attorneys work with them in the interview. so they thought and the tape rolled and we have a copy of it. >> simpson was surprisingly calm for a man whose ex-wife had just been murdered. >> very narcissistic and self- assured. has to be in charge at all times. >> cops were drawn to a cut on simpson's left middle finger and this is where simpson's answers started becoming more vague. >> how do you get the injury on your head? >> i don't know. i expect when i was in chicago. >> how did you do it? >> i broke a glass. one of you guys called me and i was in the bathroom. >> is that how you cut it? >> it was cut before but i think i just opened it. >> police found a blood trail from the bronco to his house. now, simpson offered a few new details to help explain it. >> we don't know direction this is taking us but there's enough , i want your blood, i want to document that they are and i want your fingerprints. >> by now, simpson appeared to be sensing trouble and attempted to straighten out his story. >> i know i'm the number one target and now you're telling me i've got blood all over the place. >> is that your blood? >> if it stripped, it's what i dripped running around. >> after 32 minutes, detectives wrapped up their interview and whisks simpson to a lab where he was printed and his finger photographed and most importantly his blood drawn. >> if this guy is our suspect, his blood will convict him. at the core of this case is blood. blood everywhere. and he's got the evidence we want in his body. >> for now, simpson was allowed to leave. that may have been a measure of his celebrity. or that police had suspicions they could not get back up. but back at simpson's estate, or evidence was turning up including a pair of blood he socks on his bedroom floor. and at the crime scene itself, or blood drops were swapped from the walkway leading to the alley suggesting the killer was bleeding as he fled. >> we have now videotape showing the bodies of simpson's ex-wife and unidentified man as they were removed from a walk in front of her condominium. >> monitoring all of this from her office at the courts building was deputy d.a. marcia clark who had not yet been officially assigned the case. did you campaign to be put on this case? >> at that time it was just another big case and that is what our unit did. we handled high-profile murder cases. that was it. it was a good case, so of course i wanted it. did i want to for fame and fortune, , no. -- hell , no. >> he had no idea how many ways his life was about to change. because when fred got home he and his wife received a phone call from the coroner's office. >> this individual said to me, did you hear on the news today that nicole brown was killed and your son with the other person? that's how we found out. over the phone. the two of us stood there crying our eyes out. >> through his shock, fred knew he had to tell his daughter kim who sensed something was wrong the minute she heard his voice on the phone. >> when he said, did you hear the news at all today? and i said, no, what's going on my deck? and he said that ron had died and rob was killed. i remember not too much after that. i just robert screaming and he told me to get home. >> ron goldman was just 25, handsome, athletic and popular. this rare footage was taken the year before his murder. the goldmans did not know it, but this would be their last big celebration as a family. in june 1994, ron was working at a restaurant where nicole and her family had dined the night of the murder. when nicole's mother left her eyeglasses there, it was ron who later brought them to nicole's condo. the lies of two families were suddenly tied together forever. in greece. >> i believe he walked into a crime and process. and he had a chance to walk away. run. and he did not. so he died trying to do the right thing. and that is painful. >> as night descended on brentwood, o.j. simpson was back at his estate and kato kaelin says simpson wanted to have a little chat. to discuss the timing of their mcdonald's meal. it was a conversation he tell dateline that had simpson suggesting a cover-up. >> he tried to tell me, you know where i was, kato? he was trying to convince me about what i believe now was an alibi for him. >> he was trying to get you to agree that you spent more time with him that last evening that you actually hack? >> i think it was in the time frame he was the and i said, no, you weren't. inside i'm thinking, he's trying to make me say something that is not true. >> kato kaelin was seeing another o.j. simpson, far different from the celebrity image that simpson had so carefully cultivated and protected. but simpson also had a dark and violent side. one that had nicole fearing for her life. just weeks before her murder. >> coming up. >> can you get someone over here now? he's back. he's o.j. simpson. i think you know his record. >> did nicole simpson predict her future? >> she said things are really bad between o.j. and i and he's going to kill me and get away with it. >> when "dateline" continues. t. ♪ ingrezza ♪ ingrezza is clinically proven for reducing td. most people saw results in just two weeks. people taking ingrezza can stay on most mental health meds. only number-one prescribed ingrezza has simple dosing for td: always one pill, once daily. ingrezza can cause depression, suicidal thoughts, or actions in patients with huntington's disease. pay close attention to and call your doctor if you become depressed, have sudden changes in mood, behaviors, feelings, or have thoughts of suicide. don't take ingrezza if you're allergic to its ingredients. ingrezza may cause serious side ef