Sick and the Dead (2009)

Flynn, Alex and Joe were right in the middle of ordinary lives when a zombie plague led them on a detour through a world of terror. One year later, they're no longer the same people they once were: one - a bloodthirsty psychopath, one - a survivalist and one - an unlikely hero. Surrounded by the flesh-eating undead, the three come together to form an uneasy alliance. But who offers the bloodier fate, the walking dead or the psychotic living?