in this will pay for it. >> when people are desperate, they do desperate things. >> very violent conniving. >> she is into sexuality, and such a calculated way. >> i'm not surprised by anything. it's just crazy twist after crazy twist. it really was internationally choreographed, good old-fashioned sting operation. >> you think it was going to work? >> honestly, i give it a 50/50 chance. >> it wasn't about retribution. it was about justice. >> it was a quiet fall night, close to midnight, the young couple finished dinner and then walked to the dimly lit centuries old cobblestone street of old san juan puerto rico, heading for their car. suddenly, a man armed with a knife and a loose block from the cobblestone streets attacked. the husband adam anhang fell to the ground. >> but the witness remembers hearing was adam screaming, run baby, run. >> fighting back as hard as he could, adam never stood a chance. >> he was stabbed repeatedly. >> it with the brick over the head. >> and, like that, it was over. the attacker melted back into the darkness, leaving adam and his wife aurea lying on the street. and ambulance arrived loaded aurea with injuries on her arms and legs onto a stretcher and with her way to the hospital. but for adam, it was too late. he was 32 years old. >> the coolly police quickly arrived to the -- journalist -- , covered the murder for puerto rico's highest circulation newspaper. it happened in september 2005. >> right, here on these cobblestones -- >> he died right here. >> and, that kind of thing doesn't happen. i mean, old san juan is relatively safe. >> yes. >> especially in this time of, night that time of year. >> in my years of experience, i don't experience a murder of someone. i'm talking about 20 years. so murder of a businessman in puerto rico, is something unheard of in puerto rico. >> unheard of to jose, unfathomable to those who knew adam like lily gracia. >> it was devastating. because adam had so much potential. >> another friend, andy wendell remembers finding out in the middle of the night. >> a professor from business school called me and told me he was dead. he had been murdered. i couldn't believe what happened. >> holds it got a call from the same professor. >> and he said, adam passed away. and i still get chills and i think that up that moment it just was oh well could have just pain and everybody run to see what happened. all i could say was adam died, adam died. in winnipeg, canada. adams, parents barabara and abe learn from their daughter, becky the devastating news left them reeling. it was as if the ground had disappeared beneath our feet. we felt like we were rolling through the universe. could not even register the information. and to hear all it happened, helping close? that >> will tell you, something i wanted it resolved then and there. whoever did this was going to pay for it. and that was what i said to myself, five seconds after i heard. >> that was your mission? >> yes. >> abe anhang, you'll hear more from him later and how his love for his son would lead him on a 13 year quest for justice that would uncover secrets and span continents. but in those first hours and days after the murder, it would be after the old san juan police to find adam's killer. and, in the early 2000s, that was almost herculean task. , because while the tourist, heart of puerto rico, old san juan, was all but free of violent crime. the rest of the island was not. >> during that time, puerto rico was ordering thousands of murders a. here we had a higher murder rate in los angeles, and they're 6 million people in los angeles and less than half puerto rico. >> but, this is a high profile case. adam was a prominent businessman on the island. he was also canadian and therefore considered a terrorist. so, his murder, smack in the middle of all saint laurent became a top priority for law enforcement. >> how much pressure was there on the police, then in the days that followed to make an arrest on the case? >> detective, in charge of the, case they were being very pressured by the higher ups to solve the case. >> the detective didn't have much to go on. robbery didn't seem to be the motive because nothing was taken. >> didn't take his wallet. didn't take his watch. >> didn't take his watch. so, it looks like a senseless murder. >> a senseless murder with multiple witnesses, including adam's wife, aurea who was in the hospital recovering from her injuries. detectives got her statement and found out looking to speak to any others. >> they had eyewitness accounts. >> what was the description of the killer look like? >> the general description from two witnesses who came forth, since the beginning, also -- pushed aurea and then went back to attack adam. >> heavyset, tall, so the police knew what the killer looked like. now, the pressure was on to find him, and answer the most important question, why did he kill adam anhang. >> coming up -- adam had been working on million dollar real estate deals and one of them gone wrong. >> he's doing this all over the world. >> all over the world. >> and, later, marriage and deception. >> he came to realize, immediately, that it was all about the money. >> as a father searches for the truth. >> he didn't stop. >> and the, fbi launches a stand to catch an international fugitive. >> did you think it was going to work? >> i give it a 50/50 chance. >> when dateline, continues. introducing finish ultimate. engineered for the toughest conditions. dry burnt-on stains. old dishwashers. very hard water. new finish ultimate, with cyclesync technology, helps deliver the ultimate clean. ♪ you're probably not easily persuaded to switch mobile providers for your business. but what if we told you it's possible that comcast business mobile can save you up to 75% a year on your wireless bill versus the big three carriers? have we piqued your interest? you can get two unlimited lines for just $30 each a month. there are no term contracts or line activation fees. and you can bring your own device. oh, and all on the most reliable 5g mobile network nationwide. ♪ >> adam anhang left his home wireless that works for you. it's not just possible. town ♪ ♪ of winnipeg, canada as a young ♪ ♪ man seeking his fortune and ♪ ♪ determined to make his mark on ♪ ♪ the world. ♪ ♪ he returned for a final time ♪ ♪ in the casket. ♪ ♪ at 32, still a young man. ♪ ♪ but, if the size of his ♪ ♪ funeral was any indication, he ♪ ♪ had succeeded in leaving an ♪ ♪ indelible mark in those around ♪ ♪ him. ♪ ♪ >> there was hundreds of people ♪ ♪, there was zent a empty seat ♪ ♪ inside the service and it was ♪ ♪ just a gloomy day to see a ♪ ♪ fantasy park wouldn't becky and ♪ ♪ to see the pains that haunts me ♪ ♪ still. ♪ ♪ >> the anhang family is jewish ♪ ♪, and part of a traditional ♪ ♪ burial services shoveling dirt ♪ ♪ on the casket. ♪ ♪ >> to watch mr. anhang all you ♪ ♪ could see was this pain, anger ♪ ♪ and sadness with just the way ♪ ♪ that the quiver it was very ♪ ♪ powerful visual for the rest of ♪ ♪ my life this is his dad bearing ♪ ♪ his son. ♪ ♪ >> parents aren't supposed to ♪ ♪ bury their children, and so ♪ ♪ for the anhang's it marked the ♪ ♪ unnatural end to a life that ♪ ♪ began with so much promise. ♪ ♪ i heard you used to walk along ♪ ♪ with a little briefcase, is ♪ ♪ that true? ♪ ♪ >> in the first, day in ♪ ♪ kindergarten, he used to ♪ ♪ briefcase. ♪ ♪ i never thought he was ♪ ♪ a little, boy he was a little ♪ ♪ man. ♪ ♪ he like to do things on his ♪ which is the top business school in the world. the wharton school at the university of pennsylvania, adam was taking graduate level courses at the prestigious business school, even though he was still an undergrad. that's where he found a kindred spirit. >> we happen to sit next to each other in real estate class and we happened to start talking. not very tall, thin person, but had this giant personality. i was so enamored by him. friendship organically ensued from there that, in many ways, became the first time they met. with his friend, and he said can i sit with you? case a, i'm busy here? he had great smile, energy, so he sat down and felt like i wanted. more >> irritated between business topics and ideas, just the kind of things that young kids go through. he was a person that would call at two in the morning that if i wanted to have a business idea, so we had to go to work or go to class. >> it's a recurring theme among adam's friends, the man with a big smile and giant personality was always there when you needed him. >> what was it about his personality that was to you that was the signature adam? >> he had the biggest hard of anybody i've ever met, whether you needed the friendship, you needed the advice. whatever you, needed he was giving and he was. there >> -- >> he was, to an extreme fault, he was, trusting and he was trusting of everybody and he believed that the kindness that he gave, not everybody had. , and that was always the conversation that we had, i would say, not everybody is like you. >> after graduated from college, adam dove headfirst into the business world where he possessed an innate ability to spot a good deal. >> i'd always tell, you're the smartest person i know. because he could think outside the box and he saw when nobody else saw. >> he was building the buildings hotels in markets that had no hotels, live to some of. them >> and he's doing this all over the world. then >> all over the world. my name is adam anhang and i'm class of wharton school of business 96. >> they brought him back to the wharton school of business in 1996. >> how many women have to ask? [laughter] >> the nature of being an entrepreneur is that you're constantly putting some ideas -- >> as adams business grow, so that his reputation as a problem solver. that reputation is what first brought him to puerto rico in 2002. >> carlos was working for real estate developer, who wanted adams help in finalizing a hotel deal. >> and what was your impression about? i'm >> young, innocent, really nice kid and he came here and he fell in love with the area. >> ♪ ♪ ♪ >> puerto rico [speaking non-english] the enchanted island, as it's called, and with its pristine beaches, crystal blue water and historic old old san juan, it's easy to understand why. but, adam was enchanted by something else he saw on the islands. opportunity. >> i thought, what is this a look at going to come up? with i mean, what can he do, this is a child. >> lili gross gamut out of their's business partner. so we didn't think that there was that much potential have five minutes, and you realize that there's something there. >> in fact, adam helped open the first major hotel. the small puerto rican island once used by the u.s. navy, as a bombing range, but now it hurst micah. >> was there a lot of hope in what he was planning? >> absolutely. he had a lot on the table. >> but, to lily, there was much more to her friend adam than just her forward thinking business savvy. >> for me, i love this with. he had that, bright sarcastic humor. and yet, he was very kind. he was in pretension. he was just adorable. sweet, sweet, adam. >> sweet adam had found a new blazed go home. a new place to pursue his dreams. and it wasn't long before he found him self pursued. by a beautiful young woman. did she catch is i right away? >> i don't think it is right away because he had other girls around him, to. it wasn't her, but she was the most persistent. >> coming up, >> >> we are at the restaurant and aria had parked the car. >> adams last hours alive. >> we parked on the street where they were minute on the assailant who killed adam on this cross action. here >> and detectives make our interest. >> he had no criminal record. >> did you think, a sense of relief, finally? >> sure. >> when dateline continues. n dateline continues wh-who wants to talk about their heart! 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[crying] addams family put up a 25,000 dollar reward. asking for information that would lead to the arrest of adam keller. eyewitnesses describe the killer, as a tall, heavy set mellen who fled the scene on foot. towards a neighborhood called -- a depressed area of old san juan. but there were discrepancies in the various eyewitness accounts. including the one that aurea gave in the hospital. detectives wanted to clear them up. so one of them went to talk to aurea at a restaurant, two and a half weeks after the murder. she was not there, but somebody else caught his attention. >> so he went directly to the pink skirt. and he finds a kid who looks like it's the first time who has seen someone with the description of the assailant. >> when the man refused to answer the detectives questions, he was arrested on the spot for suspicion of murder. his name was jonathan roman. and he lived in law perla. >> he had no criminal record. >> he denied killing or even knowing adam, but when he was picked up by one of the witnesses, who was a lawyer. it was enough for the authorities. he was charged with adam anhang murder. >> when you heard he had been arrested, did you think sense of relief? finally? they caught a guy? >> sure. >> he pleaded not guilty. and was released on bond. >> translator: i am not a murderer. >> he spoke with dateline in 2007, as he awaited trial. >> >> translator: i don't have anything to hide. i am innocent. >> he said he had been at home, sleeping on the night that adam was murdered. but did not have anyone to backup his alibi. >> they saw someone, but they did not see me. >> in september of 2007, two years after adam's murder, romance trial began. and of course abe was there. the case hinged almost exclusively on the testimony of that lawyer who identified roman as adams killer. >> that lawyer was adamant in his statement, and he would say basically, i sleep well every night. >> the jury believe him. jonathan roman was convicted of killing adam. and sentenced to 105 years in prison. but romance conviction did not bring the anhang family the closure one might expect. >> today part of the truth came out. >> you told them when he was convicted, today part of the truth came out, but there are others involved. >> that's exactly right. >> what did that mean? >> i thought there was something crazy going on, that didn't make any sense. >> the suspicions were fueled by a theory that the prosecution said raise that trial. that adam's murder that had not been random at all. roman had targeted him. and somebody had put him up to it. for adams friendly and friends, it was clear who that somebody was. >> in spite of the pain and the agony, we all corrected the dots. very quickly. there was no doubt in my mind and in those of us that knew that she had something to do with it. >> coming up! >> it was total gave. she wasn't even attracted to him. >> a very smart guy, fooled by the oldest pick in the book. >> she tricked him into marrying him? >> she tricked him into marrying him. >> she is the ultimate con. and she is very, very skilled at what she does. >> when dateline continues! copd isn't pretty. [coughing] i'm out of breath, and often out of the picture. (♪♪) but this is my story. (♪♪) and with