and it was a breakthrough with hall. >> he not only now looked at me as a guy that he could look at and say, wow, he thinks i'm cool, coming from him, that's a compliment. and now he's also able to protect me. >> now, keene had hall's trust and had him talking. one night, in hall's cell, he told keene the truth about what happened to tricia reitler. but what hall told keene was different from what some investigators believed. it was his story, along with some evidence that created a roadmap i wanted to follow to try to figure out what happened to tricia reitler. tricia would have left this supermarket parking lot, walking just a couple of blocks back to campus.