back to find those folks who had only suspect one he was calling himself the 13th barrett, christopher chichestere man remembered chichester, asking to borrow a chainsaw. and now, dana four are told detectives something seem the key evidence. during one of chichester's backyard trivial pursuit parties, she noticed a part of the lawn looked like it had been freshly dug up. >> i said to him, you know, what is with your yard? what happened to your yard? and he just said, well, i am having plumbing problems. >> detectives were astounded at the implications. >> at that point, he is taking ownership of the grave, because that is where john's body was found. >> they detectives, pouring over the evidence from the boston kidnapping case found this. reason to believe the prime suspect had totally rebooted his identity, after san marino. >> in boston, we found some documents, some computer hard drives. his life begins roughly in 1988. >> what did that tell you? >> i would say that it is some evidence of a consciousness, trying to erase a part of one's life. >> but detectives could not erase the nagging ques