Sleepy Hollow (1999)

Near the end of the 18th Century. Constable Ichabod Crane (Johnny Depp) earns the disfavour of the courts in New York City for insisting that scientific methods be used to solve crimes rather than guilt by assumption. In reproach, he is assigned to solve a series of beheadings in the remote village of Sleepy Hollow. Crane dismisses the villagers notion that the murders are being conducted by the ghost of a headless Hessian horseman and is insistent there must be a mundane explanation. However an encounter with the Headless Horseman convinces him of its supernatural existence. But as he investigates further, Crane realizes someone in the village has the Horseman’s head and is raising the ghost to do their bidding.