The evidence suggested the woman had been bound, sexually assaulted and murdered. Afterwards, the killer spent hours at the crime scene, wiping away his fingerprints and disposing of everything which might incriminate him, including the woman’s body. Police now face a daunting task: They not only have to find the killer, they also have to find the body of the victim. Originally aired as Season 13, Episode 45. (thetvdb.com)