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SPOILER ALERT!!! In movie, "The Departed" why did Mark Wahlberg (Dignam) kill Matt Damon in the end?
Can you explain to me why Mark Wahlberg's character killed Matt Damon's character in the movie "The Departed"?
In the movie "The Departed", Mark Wahlberg's character, Dignam, killed Matt Damon's character, Sullivan, because Sullivan was a dishonest cop who had been working with the mob for years. Dignam felt it was necessary to eliminate Sullivan in order to rid the police force of corrupt officers and restore honesty and integrity to the department.