Dustin Cyril Robles

A star witness in a high-profile narcotics case is murdered along with his girlfriend. Despite detective insistence that the woman was an incidental victim of the crime, Patrick begins to wonder whether she was in fact the killer's primary target.

Robert worries about news of his heart attack leaking to the press; Kevin and Scotty discuss the real possibility and challenge of surrogacy.

In the finale to the seventh season, the identity of the replica serial killer is finally revealed, but not before a member of the CSI team is placed in grave danger.