six months after trisha's disappearance, now 15-year-old jessica roach goes missing in georgetown, illinois. investigator gary miller got the call. >> we all knew that we had something really bad here. we had an abduction. >> jessica's badly decompose body was found in an indiana cornfield weeks later. but then, like trisha's jessica's case went cold. >> there's a lot of times you wonder whether you'll ever solve it but you know you'll keep going and check everything out and recheck everything. >> for over a year, miller scoured local police reports and then, a break. a vehicle reported in a county nearby. the owner? larry hall. >> he had been involved in stopping some girls. those girls were scared. they ran from him. >> in the last six months, hall's van was spotted by more than 11 girls in five different towns close by. including those where jessica lived and where her body was found. now, miller contacted the police in hall's hometown to arrange for an interview. >> he initially said, no. he hadn't been over here. >> miller had to coax hall to admit being near jessica's house. >> i said

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 that we had something really bad here. we had an abduction. >> jessica's badly decomposed body was found in an indiana cornfield weeks later. but then, like tricia's, jessica's case went cold. >> there's a lot of times you wonder whether you'll ever solve it but you know that you'll keep going and check everything out and recheck everything. >> for over a year, miller scoured local police reports and then, a break. a vehicle reported in a county nearby. the owner? larry hall. >> he had been involved in stopping some girls. those girls were scared. they ran from him. >> in the last six months, hall's van was spotted by more than 11 girls in five different towns close by, including those where jessica lived and where her body was found. now, miller contacted the police in hall's hometown to arrange for an interview. >> he initially said, no, he hadn't been over here. >> miller had to coax hall to admit being