John Carpenter's Night Terrors

When Special Agent Angela Hernandez follows the trail of a savage murder to a small town in Rhode Island, she discovers the town has many secrets. Including that most of the residents, as well as her partner, Officer Shawn Cutler, are werewolves. Convinced that one of the townspeople couldn't commit violence against a human, Cutler assists Hernandez, torn between duty to his shield and to his hometown.

But as the investigation goes deeper, corruption and greed are exposed, as, all the while, they are hunted by an unknown enemy. And you don't need a silver bullet to kill a werewolf.

A regular bullet will do the trick.