the case, opening files no one has looked at in decades and using new technology in an effort to learn who might have kidnapped the real paul fronczak. for detectives few things are as rewarding like cracking a cold case like the one you just saw and putting a criminal behind bars years after the crime, but what if they get the wrong guy? next hour we're going in-depth and learning about a case where some people say justice was served but not everyone is convinced. >> on december 3rd i went out to play a game called duck the cars with maria, a man approaches us coming down the street and asked us if we'd like a piggyback ride. that's the last place i had seen either one of those two were on that corner. >> the police were out with the