The Killer Inside Me

Casey Affleck plays Lou Ford, a sheriff's deputy in a small Texas town circa 1957. When the son of the town's richest man starts up an affair with a prostitute Joyce (Jessica Alba), Lou is tasked with running her right out of town. Instead he falls hard for Joyce, mostly because of the violent sex the two share. Without much in the way of an obvious reason, Lou comes up with a plan to kill Joyce and frame the son - making it look like they killed each other. There is a small hiccup when Joyce survives - causing plenty of stress for Lou which spills over to his relationship with his girlfriend Amy (Kate Hudson). More than that, it attracts the attention of the D.A. and sets a series of events into motion that find Lou committing more and more heinous acts to cover his trail.