Marty Jay Williams

Marty Jay Williams is the third antagonist in GTA: Vice City Stories and the leader of the Trailer Park Mafia. He is the husband of Loiuse, main love interest of Victor Vance and the brother-in-law of Phil Cassidy. Marty has connections to poor gangs and is involved in prostitution rackets. She married Loiuse and had one child together. Marty is believed to a pedophile in the game. Early, Victor Vance met Marty through Phil Cassidy and was disgusted at Williams' treatment of his wife.

Loiuse moved out from Marty's place and raised her child with her sister. Marty however kidnapped Loiuse and intending to make her a prostitute but was stopped by Victor Vance.