Gabriel Byrne played the corrupt police officer Dean Keaton in The Usual Suspects (1995).
Keaton is one of five criminals brought together after a mysterious ship-related crime. Before the events described in the film, he worked as a New York police officer and became involved in corruption, eventually attempting to leave criminal life behind.
The film’s central account is delivered by Roger “Verbal” Kint, played by Kevin Spacey. That distinction matters because Spacey’s performance won the Academy Award for Best Supporting Actor, while Byrne plays Keaton, the older and more experienced figure among the group.
Bryan Singer directed the film from a screenplay by Christopher McQuarrie. The story is structured around interrogation, competing identities, and a gradually changing understanding of what happened, making character names especially easy to mix up.