Unsolved Mysteries

Authorities search for a suspect in the rapes of two Texas A&M students; a woman credits her medical recovery to a visit from a ""healing UFO""; and a former reporter tries to locate the woman she recently discovered to be her sister. Also: a probe of why serial killers murder. Wanted: Don Richard Davis, Jr. Update: Wanted - Trent Stephen Fouts Unexplained Death: Kristi Lee