The First 48 S04 E19 Easy Prey / Widowmaker

In Dallas, detectives are working a shooting that left a 26-year-old woman dead, when a mysterious caller gives them a one word nickname--"Mississippi." In Miami, an elderly man is found duct-taped and beaten to death outside his house as his wife of forty years is asleep inside. Detectives have to find out whether the murder is a simple robbery, or a twisted act of retribution.