Michael Rooker has been cast in James Gunn’s upcoming horror thriller ‘The Belko Experiment’. Gunn announced the news via his Facebook account. Rooker is cast as head of maintenance in the Belko Building, Bud Melks. The story centers around the employess of the Belko Corporation, who are mysteriously forced to kill each other or be killed. John C. McGinley, Tony Goldwyn, and Melonie Diaz were also announced as cast members earlier this week. Gunn penned ‘The Belko Experiment’ with Greg McLean, who is directing the film. Gunn, along with Peter Safran are producing the film. ‘The Belko Experiment’ is set to begin filming in Bogota, Columbia next month.