 Victorian Ombudsman George Brouwer has called for a review of MCC procedures after finding staff subjected the man to excessive force and "serious mistreatment".The prisoner, identified as Mr A, was left bloodied with a cut to his head after being pinned to the ground and hit during a strip search on June 13, the ombudsman's report said.Closed circuit TV footage of a prisoner being wrestled to the ground and assaulted has exposed a culture of brute force at the Melbourne Custody Centre, the ombudsman has found.