Casey Affleck: The Killer Inside Me

Casey Affleck and his wife Summer Phoenix take their two sons, Indiana, 4, and Atticus, 1, to the Los Feliz Public Library in Los Angeles on Saturday.

The 33-year-old actor and Jessica Alba just teamed up with director Michael Winterbottom for The Killer Inside Me, an adaptation of a novel from noir author Jim Thompson.

According to THR, the story follows a West Texas sheriff (Affleck) and his downward spiral from a boring small-town cop into a ruthless, sociopathic murderer. Alba plays a prostitute.