Mr. Brooks(2007)

Consider Mr. Brooks: a successful businessman; a generous philanthropist; a loving father and devoted husband. Seemingly, he's perfect. But Mr. Brooks has a secret--he is an insatiable serial killer, so lethally clever that no one has ever suspected him--until now. Earl Brooks is a man who has managed to keep his two incompatible worlds from intersecting by controlling his cunning, wicked alter ego Marshall. But now, as Mr. Brooks succumbs to one last murderous urge, an amateur photographer witnesses the crime. Suddenly Brooks finds himself entangled in the dark agenda of an opportunistic bystander, as well as hunted by the unorthodox and tenacious detective Tracy Atwood. Can Mr. Brooks outsmart his adversaries and conceal his shocking double life from his wife and daughter, or will someone expose his crimes and his identity once and for all?