Animal Factory is a 2000 neo-noir film directed by Steve Buscemi and starring Willem Dafoe, Edward Furlong, Danny Trejo, John Heard, Mickey Rourke, Tom Arnold, Seymour Cassel, Shell Galloway and Mark Boone, Jr. Set in San Quentin, the film is about life in prison. It is based on the novel of the same name by Eddie Bunker who plays the part of Buzzard in the film.
Animal Factory was filmed at Holmesburg Prison in Philadelphia, Pennsylvania. Filming was completed in 30 days, two days longer than originally scheduled. Buscemi employed hundreds of prisoners from Curran-Fromhold Correctional Facility, the prison that replaced Holmesburg Prison in 1995.
(Summary from Wikipedia)