they asked me if i knew heather. >> troy bonnell says he and heather had a very difficult relationshipas odd that his dna would be there, but touch dna can be on items for lots of different reasons. if that cigarette pack had been in his house, and he picked it up and moved it, that would mean that heather was, in fact, there, at his house >> certainly that caused problems and it raised suspicion and turned him into an alternate suspect for the defense. that was viable for them. it gave them an argument at trial that had he been honest about everything, i don't think would have carried much weight. >> what we knew at that point was that the night before troy was with another woman, and that the other woman had confirmed his location and what he was doing. >> that's an alibi? >> yes. >> he had an alibi. >> the defense was ridiculous. i could not believe that that was their only defense was what about troy? what about troy? >> did troy drop everything he was doing on his ranch to go, you know what, kevin? i'll go ahead and day, of that murder for you. i got you, buddy. no. it's ridiculou