the abandoned chrysler lebaron?ice have been able to link it back to a car lot in west palm beach. that's right. michael warren's car lot. >> reporter: when we come back the wealthy wellingtonites think the pieces of a puzzle are coming together. >> you ask him -- >> i asked him. >> to his face, did you -- >> uh-huh. >> kill your wife? >> well said did you have anything to do with it? so why for almost 27 years does the case go ice cold? >> how is it that police would not have arrested her in the least on that evidence? >> it's not illegal to buy balloons or a costume. >> reporter: stay with us. i rode shotgun in lead humvee and i looked for bombs. stop short. i don't see nothin' man. you don't see it, he feels it. you are my hammer out there. don't let these young guys see you fold. ♪ i'm only human, i make mistakes ♪ ♪ i'm only human, that's all it takes ♪ ♪ to put the blame on me i'm alive because of you. i'm not a hero. we're brothers, we look after each other. thank you for your service. rated r. real energy ha

back in 1990, investigators reportedly found orange fibers possibly from a wig and hair in that chrysler lebarony car. >> if they found hair, the statistics are basically one out of 10,000. if they found blood, great. that would give you a slam-dunk because you would end up with statistics of one in trillions. >> can you really go back 27 years and test evidence for todas dna technology and make a case? >> yeah, without a doubt. as along as the dna has been preserved cold and dry. cold and dry. the testing has gotten so incredibly sensitive. so specific. there's no way out. they're going to get results. >> reporter: back in abingdon, virginia shock and bewilderment after that friendly neighbor "debbie" is charged with first degree murder. >> i've been in shock ever since. >> yeah, couldn't believe it. still don't. just hope and pray that she's not guilty. >> reporter: the blevins say since "debbie's" arrest her loving husband mike has been holed up in his home apparently in a state of stunned disbelief. >> very distraught, which he would be. he told me, he said, "you know she didn't do this." he

. >> he remembers seeing the clown's brown eyes as the clown got into a white chrysler lebaron. >> reporter his mother dies. >> this is the entrance to our clown room. she liked the clowns when she was a little girl. i come in here and i think of her. >> reporter: an eerie and ironic twist. shirley and bill telling abc news their late daughter loved clowns. >> marlene was outstanding. friendly, loving, kindness, do anything for anybody. >> always courteous, always respectful. >> reporter: police quickly zeroing in on a suspect, 27-year-old sheila keen, a business partner of marlene's husband mike. detectives looking into rumors of an affair between the two which they deny but without enough evidence the case goes cold. no longer followed in the press until this past may. a journalist looking into the murderer finds sheila keen now calling herself debbie and married to marlene's husband mike. >> friendly, outgoing, nice. >> i turned angry when i heard mike had married sheila, angry. >> reporter: police conduct new dna testing and just weeks ago take sheila keen warren into custody charging h