keene and put him behind bars, suddenly wanted to talk. a top-secret meeting, no less. what more could he do to jimmy? >> he was the last person i expected to hear from. he was my biggest fear. >> reporter: but keene's fears went off the charts when the prosecutor, larry beaumont, slid an accordion file in his direction. on top was a grisly photo of a dead girl. >> and i flip to the next page, and here's another young, dead, mutilated girl. and i'm thinking whoa, wait a second. >> he's probably thinking at this point that you're about to charge him with something else. >> yeah, because, you know, i had been pretty rough on him in the initial prosecution. >> reporter: jimmy was in the dark. he had no idea the crazy scheme beaumont had in mind. >> he says, jimmy "listen." he goes, "this is something that we have another person on. he has killed many, many young women. and i personally think you're the one that can help us with this." >> reporter: this turned out to be an investigation to try and catch a suspected serial killer. beaumont, an outside-the-box thinker, believed this convict, jimmy keene, was