S4·E3 Vendetta

A young man is mysteriously killed while at a well known local spot, a place where a woman was lynched in the 50's. His skull is crushed, but not his head, and his body is covered with what looks like electrical burns. The coroner is an old aquaintence of Dereks and he asks if Derek will come and help. He takes Kristin with him and they find a small town with a deep, dark secret.