Dead & Buried
A series of bizarre murders of outsiders is taking place in the lovely, foggy town of Potter's Bluff, and Sheriff Dan Gillis is at a loss as to how to explain what's going on. Now he must face both a hidden murderous violence and his wife's unusual behavior as he uncovers the terrible truth of what's going on.
It's difficult to get into any greater detail then that, as the secret in Potter's Bluff is shocking and disturbing, and knowing what that secret is can change how you view the film. Just know that I loved watching Sheriff Gillis slowly uncover the plot to its twist ending. There's some nasty gore along the way, and some hideous murders(including a syringe used to murder a man that is...well, it's something all right). And rewatching parts of the movie knowing the twist makes my skin crawl.
It's worth watching. Even telling you what kind of horror movie it is will give away too much. Just know that I really enjoyed it, and you're doing yourself a favor going into it blind.