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Forensic Files II

and that was all we knew. narrator: by this time, codis, the national dna database, was in full swing, but the dna sample from individual "a" didn't match anyone in the system. years and years went by with no luck, no matches in the database. narrator: in 2010, dna analysts turned to the letters. using touch dna, they were able to lift a genetic profile, but it did not match the dna of individual "a." in an attempt to generate more leads, copies of the letters were broadcast and published. amazingly, someone recognized the handwriting. a potential suspect was finally identified and confronted. he readily admitted that he wrote the letters and apologized for doing so. narrator: and the letter-writer's dna

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Forensic Files II

not realizing his arm left touch dna, his genetic signature, on her neck. he checked her cellphone, saw the sexually explicit request, and realized that posing her in this way was an ideal way to throw off police. afterward, he cleaned the scene, going so far as to wash the bedding and wipe down the washing machine. later that day, he used chanin's phone to send a series of text messages. this made it seem she was still alive. it broadened estimates for her time of death, and it gave him an alibi. clay really is diabolical in using this cellphone. narrator: but what ultimately broke the case wide open was chanin attempting, however unsuccessfully, to call 911.

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Michigan State Police Bridgeport crime lab tackles backlog

BRIDGEPORT, Mich. - Michigan State Police runs and operates seven crime labs throughout the state.Inside these labs, there are scientists examining evidence.Som

Michigan-state-police , Michigan , United-states , Lisa-mayfield , State-police , Michigan-state-police-bridgeport , Bridgeport , Law-crime , Onnecticut , Crime-lab , Touch-dna , Forensic-science

Dateline

>> we saw some -- in the sink, so there's a good chance that he or she has washed their hands in some point, and possibly got the victims blood off their hands. >> the killer had also cut themselves, and the killer's blood was mixed with meghan's. there was no shortage of physical and formation left behind. >> you've got your killer indian a form, practically, you just do not know who he is. >> we had his touch dna, his blood and dna, his semen, we had his fingerprints. so, the so forensically, we had what we needed. it fell on the detectives, at

Chance , Sink , Megan-landowski-s , Killer , Blood , Point , Hands , Victims , Shortage , Formation , Dna , Touch-dna

Dateline

that's right. and they figured, based on their review, that they couldn't do it. >> some of the reasons were apparent from the get-go. >> you look at it on its face, this case was a really tough one. >> for one thing, there was so much evidence they didn't have against sam. >> there is no murder weapon here. we had no witness. we had no compassion. we had no dna. so, you can look at it that way in that conventional review. yeah, it looked really tough. >> what really made this case a prosecutor's nightmare was the fact that all the physical evidence put away from the man they thought was a killer. any defense attorney would ask if police found appeared dna and fingerprints, why would they charge them? >> were you surprised you didn't find sends dna there? >> yes. >> he thought newer, better test might find sam's dna. >> but it was too late for

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Dateline

he doesn't want to remember? if he's innocent, he has members of kathy of good times, what they did. >> people want that those memories to come back. >> yeah. if you had a memory that he killed her, that certainly memory doesn't want to relive. >> after listening to the interview time and again, the evidence whisper had no doubt that sam killed café. but could the team prove it beyond a reasonable doubt? >> ultimately, in cold case murders, time because our friends because technology changes. >> at the time the murder, dna test could only be done on big samples like blood spatter. in the years since, analysis became possible for touch dna, microscopic calling cards many of us leave behind just by putting our hands on something. it's salmon happier place kathy's body in the truck, maybe, thought larry, there would be touch dna on her

People , Times , Memory , Members , Listening , Memory-doesn-t , Memories , Time-and-again , Innocent , Cold-case , Armando-s-younger-brother-sam-off-and-on , Evidence

Dateline

>> i open the cabinet, i see the tourist, case and i remember the incident with debbie from about a year earlier. i fully, iowa state reading, and just on free time, just reading it a little bit. >> by then, the kathy tourist case had been cool for a good three years. >> i'm know work had been done on it for the last two years. >> from the beginning, police had suspected kathy's one-time boyfriend sam lopez had something to do with her murder. but they had nothing connecting him with the crime. no witnesses, no dna, and some had that solid alibi. tina was still married to stems brother -- the two families intertwined, as kathy's family continued to search for answers. >> then in april of 1997, i had a phone call from -- >> kathy's mom, it would be their first conversation of many. >> mary told darrin, how she had seen reports about a new

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Dateline

>> sounds admitted jealousy, kathy doting on albert, a rejected proposal. all of it seem to add up to motive. but motives don't prove murder. there was still no physical evidence tying sam to the crime. all of the blood on the car had been dusted and it was all cafés. then, welcoming the case file, detective darren why it learns something shocking. there were blood and hair samples that had never been sent to the crime lab. and when those samples were analyzed, they pointed to a whole new suspect. >> coming up -- >> new dna. and a new man in the hot seat. >> he sat there and put his best in front of his mouth to keep himself from talking. >> when dateline continues.

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Dateline

>> -- had been nothing but trouble. >> she couldn't tell me what had, happen she was so upset. >> it was about to get much worse. >> my mom would say, if you find, the car you will find kathy. he did not want to be, dark because you wanted to keep looking. >> she had been stabbed multiple times, there was blood in the interior of the car. she was a targeted victim. >> who killed kathy? >> we had no witness, no confession, no dna. >> 20 years went by. >> they still had to keep looking for what i had lost. >> but, kathy had her, and she had him. >> i put a lot of faith in god. >> and the killer, he never had a chance. >> this was -- i fulfilled my promise. >> in the wee small hours of

Kathy-tourist-grew-up , Car , Nothing , Mom , She-wasn-t-cooperating , Trouble , Tell-me , Touch-dna , Times , Blood , Interior , Witness

Dateline

instead of reputedly -- but, she was slow to respond. >> did he call you back? >> not at first. >> but eventually they did. >> eventually did. >> but he hadn't seen her? >> hadn't seen her. >> two appearances, that was, true in the physical evidence seemed to corroborated. his dna was not found anywhere on, kathy or her car. and his clothes, the ones he gave voluntarily to police, had no dna of kathy. but that behavior of sandwiched bothered kathy's family also bothered police. they focused on him. however, when investigators took their suspicions to the orange county d.a., the outcome was not what they expected. coming up. sam has a new woman in his life, one week soon discover his old life -- >> you are freaked out by that? >> well, yeah. >> when dateline continues. ontinues can be tough.

He-hadn-t , Reputedly , Kathy-tourist-grew-up , Police , Touch-dna , Car , Evidence , Clothes , Appearances , Ones , Two , Family