and eric mullens?remember taking it home and reading it and putting it down and thinking, no, it didn't say that, and picking it back up again. >> reporter: but remarkable as ralph's letter was, it still wasn't the whole story. a few weeks after the murder, he mustered up the courage and told the police -- >> while he was held captive he had asked to go to the restroom and he was sexually assaulted in the bathroom. >> reporter: well, why didn't he say anything about that before? >> his explanation was that he was embarrassed. from my understanding, it might be a bit difficult to talk about but the smallest details could be very important so keep that in mind. >> reporter: ralph agreed to show the investigators exactly what happened. and where. >> and he grabbed me with the other hand on my hip right here and he proceeded to assault me. >> reporter: so that was the whole awful story. but if ralph thought that sharing his new, more detailed recollections would clear the air, he was wrong. what did you th