documentary. >> police were desperate to talk to their prime suspects. after four months of refusing to cooperate, the ramsays finally sat down with police in april, 1997. two more formal interrogations followed. >> i'm talking about scientific evidence. >> i don't give a flying flip how scientific it is. go back to the drawing board. i didn't do it. >> despite countless days of heated interrogation, there was no confession and no charges. >> how about the theory that this was an accident? somebody was upset over bed wetting? >> going down the wrong path, buddy. >> this $100,000 reward -- >> then the ramsays took the case to the public. >> you may be eluding the authorities for a time, but god knows who you are, and we will find you. >> the police never did.