Martin Scorseseis clearing up whatLeonardo DiCaprio’s character meant in by his final line inThe Departed.

Colin Sullivan (Matt Damon) in the film’s climactic elevator scene.

Queenan (Martin Sheen) met his fate earlier in the film.

The Departed

Andrew Cooper/Warner Bros.

There are two ways to read Costigan’s line.

Scorsese says Costigan was definitely planning to turn Sullivan in.

“He was going by the book,” the director tells EW.

“He’s trying to be good man.”

Previously, Scorsese discussed the notoriousGoodfellastest screening andtwo ways the screening changed the film.