and the piece of evidence that according to the prosecution that was credible, the bowl of the bathroom sink. kid's blood, mixed with his dna. >> if you have been if you have not been living in the house for months there's no explanation for the dna. >> then the meg nickel examiner who exhumed the body took the stand. kit was killed during pm hours. now, a quarter century later, he re-examine the report. and examined it was possible that she was killed as early as 10 am. when greg was at the house. and as for motive, there where the diaries. the one by boyd -- >> it was called a stories -- >> boy took the witness stand.