and it easily could have remained that way, except for jimmy keene. ene's story of strange redemption was featured in a "playboy" article and a book written by keene and hillel levin. >> once we were able to write about what jimmy went through, then things happened. >> keene's story refocused attention on larry hall. helped re-open cold cases and put pressure on his twin brother, gary. now gary stopped defending larry and started talking. >> larry, just like jimmy keene calls him, and he is. he's a baby killer. >> you think your brother is a baby killer. >> i don't have no doubt in my mind. >> do you think your brother killed more than jessica roach? >> yes. >> do you think your brother killed tricia reitler? >> yes. >> rayna riceon? michelle duey? >> yes. >> as gary started talking more openly, detectives approached him, asking for help. >> i went with the indianapolis detectives down to try to get my brother to confess. he made me leave the room. he did, in fact, confess on tape to 15 serial murders. >> larry later retracted, again. and while he can'