>> and then there was nici's bracelet, that gift from david, the source of her joy. david had told police it had vanished, along with his wife. >> everybody assumed that, who knows, the killer took it. >> soon after david's arrest, police learned from one of his co-workers that he had the bracelet all along. >> david said he had a bracelet that he had taken to a pawn shop, and he thought that the guy was trying to rip him off. >> he was trying to hock it, make a few bucks. >> trying to make money. >> and that spoke to his cover-up. his involvement. >> sure. absolutely. and certainly that he will lied to police in the beginning in saying that he didn't know where that bracelet was. >> still, one piece of the puzzle didn't fit the prosecution's theory, that saturday phone call made from nici's cell phone to the 24-hour fitness gym where david worked. >> this is evidence that at around noon, she is alive on saturday. >> right. >> using telephone company records, prosecutors argue the origin of the call could be traced to within a few blocks of the gym where it was received. >> what you're saying is there