hall said he had been looking for a friend's address but the address he gave didn't exist. officers let paul go. september 20th, 1993, six months after tricia's disappearance, now 15-year-old jessica roach goes missing in georgetown, illinois. investigator gary miller got the call. >> we all knew we had something really bad here. we had an abduction. >> jessica's badly decomposed body was found in an indiana corn field weeks later. then, like tricia's, jessica's case went cold. >> there's a lot of times you wonder if you'll solve it. but you know you're going the keep going and check everything out, you're going to recheck everything. >> for over a year, miller scoured local police reports. and then a break. a vehicle reported in a county