The actor-producer died on July 19 in Austin, Texas. The cause of death is uncertain, said The Hollywood Reporter.
Marquadt acted in the middle film in Rodriguez's 'Mexico Trilogy', in addition to showing up in flashbacks in 'Desperado' (1995). He also appeared in the writer-director's 2003 film 'Spy Kids 3-D: Game Over' (2003) and in the 2011 film 'The Shadow People'.
The actor got the part of the white-suited drug lord Moco in the 1992 film due to a chance meeting with Rodriguez when they were bunkmates at a medical research facility.