Examining several theories about who gunned down rapper Tupac Shakur in Las Vegas in September 1996. Other segments involve the search for suspects in the abduction of a 5-6ear-old girl; and the armed robbery of a woman and her grandson. Also: two women's search for a long-lost brother.Links: Video Clips of the Tupac Shakur segment / 2Pac Mansion - Unsolved Mysteries articleUnexplained Death: Tupac Shakur Missing: Therese Rose Walsh