The CBI team members are all in attendance at a fund raiser event when one of the contributors, Esther Doverton, receives a phone call that her jewelry store has been robbed and her husband, Carl Ward, has been shot. The team believes it was the work of someone on the inside of the Doverton Company working with the jewel thief. Using a traffic light camera's license plate image of the getaway car, Van Pelt identifies Doyle Murphy as the diamond thief. Van Pelt and Rigsby track Doyle's car to a motel, but find Doyle dead with a bullet hole in his forehead. Doyle's ex brother in law Donald Culpepper is suspected of killing Doyle when he's identified by the motel manager as the last person to visit Doyle in his room. Donald explains that he paid for Doyle's rehab while he was still married to his sister, but when they split up; Donald paid Doyle a visit because he wanted the money back, but Doyle wasn't there. Van Pelt reviews past security tapes of the jewelry store and discovers Tom talking to Doyle Murphy. Tom claims Doyle was just a customer and has no recollection of him. The team fakes the kidnapping of Esther Doverton in exchange for the stolen diamonds and Tom admits that he was responsible for the robbery and the murder of Doyle Murphy.