Mr. Brooks (2007)

Thriller starring Kevin Costner. Earl Brooks (Costner) is a successful businessman, a generous philanthropist, a loving father and a devoted husband. Seemingly, he's perfect. But Brooks has a secret - he is also the notorious Thumbprint Killer. Until now, he has managed to keep his two incompatible worlds from intersecting by controlling his cunning alter ego (William Hurt). But as he succumbs to one more murderous urge, an amateur photographer (Dane Cook) witnesses the crime and Brooks finds himself trapped in the twisted agenda of an opportunistic bystander, as well as hunted by an unorthodox and tenacious investigator, Tracy Atwood (Demi Moore). Now, a terrifying game is unfolding where desire is dark, knowledge is deadly and the man who has everything has everything to hide.