Grave Mistake (2008)

A young boy Alex King is beaten and Abused by his stepfather, Karl. Alex finds refuge with his good buddies Mike and Phil. While he is hanging out with Phil and Mike at the garage they run, the town is taken over by mindless, flesh-eating zombies. The group have to fight their way through town to the local National Guard Armory to find safety, all while trying to find Alex's missing mother.