What is 2006 best picture police drama?

In 2006, the best picture winner in police drama category was "The Departed". Directed by Martin Scorsese, the film featured an ensemble cast including Leonardo DiCaprio, Matt Damon, Jack Nicholson, and Mark Wahlberg. It is a crime drama film that follows two police moles (DiCaprio and Damon) within two Boston-based crime syndicates. The film also won the Academy Awards for Best Director, Best Adapted Screenplay, and Best Editing. The Departed was a commercial and critical success, praised for its outstanding performances and thrilling plot.