NCIS: Dead and Unburied

When the team investigates the case of a dead Lance Corporal found by a real estate agent, they realize the body was buried in the backyard and then exhumed. After determining his identity, they learn the Marine, who was deployed to Iraq but never showed up for duty, had two fiancées. Abby uses her technical knowledge to run DNA samples from the two women and soil from the grave while Ducky uses his newly obtained Masters in forensic psychology to help NCIS implicate the killer.