It's Behind You - S1.E5

The paranormal investigators are called in to help a woman who saw a corpse floating in the Potomac River and then disappear. Clues provided by a local medium and town historian connect the report to the cold case of two murders decades ago. The team conducts a nocturnal paranormal investigation in the woods by the Potomac and uncovers evidence that indicates satanic rituals or witchcraft is being practiced in Shepherdstown. The team senses a darker entity in the woods, a feeling that's confirmed when the medium suddenly feels Bill's life is in peril.