. >> reporter: one of the lookie lous, as they say. >> yes. >> reporter: which is often the case with somebody when they've killed somebody, they'll go back and ok at the investigation. >> right. >> reporter: what did you think when you heard that? >> i thought this is it. you know? >> i remember instantly thinking bonnie had pepper spray. i wonder if she pepper sprayed him and that's why he had to mask it with cologne. >> it sounded very suspicious to us. right away, we're just talking about that and jumping on that. find the guy. >> reporter: but the dna eliminated him, too. or so the troopers told karen. >> they said, no, the dna didn't match, and he has an alibi. his step-mom said he slept in that day. >> reporter: did you buy that? >> no. absolutely not. i said what if there was two people? it didn't have to be his dna. >> reporter: yes. >> he could have been involved and it was somebody else's dna. >> reporter: did you make some noise about that? >> absolutely. >> reporter: but then months went by and years, no match, no justice for bonnie. no peace for karen. for the troopers.