 Detective Carlton Lassiter (Timothy Omundson) throws them out of the crime scene shortly after they arrive, but not before Shawn is able to gather several details from the area.Back at the Psych office, Robert Dunn (Frank Whaley) asks the two to help him, believing that he is being haunted by ghosts.Agreeing to assist him, they go to his house, where Shawn finds evidence pointing to Dunn's ex-girlfriend.