Morbid (2013)

A small town becomes the playground to a masked killer stalking and killing the locals for no apparent reason. With the town's sheriff and locals still more worried about a high school football game than getting to the bottom of what's going on, one detective from out of town must rush to save the lives of a group of teens tossing a party in the middle of all the chaos. But as we soon learn, these teens have some complicated issues of their own.