Marty's gang dominates a wide range of criminal activities in Vice City's poorer communities, such as loan sharking, prostitution, and protection rackets. Victor Vance works for Marty near the beginning of the game. He is a stereotypical redneck - he has a thick accent, is a drunk, is believed to be inbred, and he verbally and physically abuses his wife, Louise; he is thus the brother-in-law of Phil Cassidy and Mary-Jo Cassidy. Louise eventually attempts to move out, but Marty kidnaps her. Vic tracks him down and kills him before he can get to his hideout. After Marty's death, Vic acquires all of the Trailer Park Mafia's businesses as his own.
Marty is voiced by Jim Burke
- GTA Vice City Stories
- Shakedown (Boss)
- Fear the Repo (Boss)
- Waking Up the Neighbors (Boss)
- O, Brothel, Where Art Thou? (Boss)
- Got Protection? (Boss)
- D.I.V.O.R.C.E. (Betrayal, Killed by Victor Vance)
- Chronologically, he is the first antagonist, and the first named character to be killed in the GTA Series.