>> i don't want to move. i love murdock. that's my home. >> narrator: but if it seems strange to you that an innocent man could remain so long under suspicion, imagine how bizarre it was about to become as the accused and the accuser play out a truly disturbing drama we'll call trading places. coming up -- troubling accusations about one of the lead investigators. so you wake up one morning and they say you're a criminal. ♪ ♪