S5·E9 Vendetta

A World War II survivor and tailor shop owner sets an ambush for an unidentified intruder when Malloy and Reed intervene. R&I determines the owner is clean and emigrated to the U.S. seventeen years earlier from Eastern Europe. The officers speak with a local priest who knows the owner, who complains to Sgt. MacDonald about what he feels is the officers' interference. Later, shots are fired at the shop, and the officers find a wounded intruder with no one else in the shop. Malloy and Reed find the owner with the priest, who informs them that the intruder is a former Nazi soldier who killed his relative during the war.