the murder of a prominent national defense expert and adviser to three presidents. eric shawn has spoken with police and has details that make the murder of shaun wheeler the iii even stranger. what is the new information. >> reporter: police are telling fox news that he changed clothes. it seems that john wheeler, who of course has been the focus of this homicide investigation was last seen in this building, here in downtown wilmington, delaware. on videotape at 8:30pm on thursday night. they want to review the videotape because we are told that he seemed to have a different outfit on than in the earlier videotapes from the day before. let's look at the earlier surveillance tape taken from a nearby court parking garage that shows him in a dark jacket, a white shirt and dark pants. could this be significant, and what does it mean? all part of the investigation into this very strange case in which wheeler the former adviser to three presidents was seen