Walt investigates the murder of a teenager who was one of four boys acquitted of raping a developmentally disabled Cheyenne girl. When another boy is killed, all signs point to the crime being an act of revenge by the girl s brother. But Walt is not convinced by the circumstantial evidence and must find the real killer before someone else ends up dead. And the arrival of a detective from Denver forces Walt to finally confront the reality of his wife s death. Charles Dutton guest stars.