The team investigates deaths and injuries resulting from a drive by shooting outside a club. The forensics team determines that the bullets were home-made and it would appear that someone in the crowd returned fire. The police want to solve this quickly before it escalates into a gang war. Curiously, the bullets fired by both sides were made using the same equipment. Nikki attempts to determine the cause of death for a badly decomposed body found in a crack house.Leo continues to have difficulties dealing with the recent death of his wife and daughter.