times that i thought, just move on. give up. move on. >> there was no hope of any new evidence, of course like fingerprints or dna. there was just the infuriating puzzle, which had become more difficult with each passing year. >> after i reviewed the case, i had no feeling for the family, no feeling for jack jessee. so, to get his head in the game. doug met with the people closest to jack, like his brother david. >> and, when i'm with david he inspired me. his determination not to let the love for his brother go was a big motivating factor. >> but david also had some provocative information, something jack told him after arguing with sandra about moving to arizona. >> if anything ever happens to me it's her. >> -- >> he actually told me i would be surprised if -- killed me. he said that. >> and so dove stick to all the