One Tough Cop is a 1998 American action crime film. It was directed by Bruno Barreto and written by Jeremy Iacone. The movie stars Stephen Baldwin as the protagonist and firstperson narrator Bo Dietl, a reallife New York City detective who wrote the book that the film is based on. Chris Penn costars as Dietls partner. Gina Gershon, Mike McGlone and Paul Guilfoyle also play key roles.