There is a VERY good chance Tupac Shakur is alive and well ... and hiding ... this according to the man who was with him during the supposedly fatal shooting in Vegas, Suge Knight.

Knight just appeared on 93.5 KDay in L.A. with Tattoo and Cee Cee ... and pumped some major fuel into the biggest urban legend in hip hop ... that Tupac FAKED his own death.

Knight says his theory explains why cops never found his murderer -- because there was no murder.... http://questionmarkmag.com/2012/04/suge-knight-thinks-tupac-is-still-alive/