CSI: Crime Scene Investigation physical evidence to solve murders. The team is originally led by Gil Grissom (Petersen), a socially awkward forensic entomologist and career criminalist who is promoted to CSI supervisor following the death of a trainee investigator. Grissom's second-in-command, Catherine Willows (Marg Helgenberger), is a single mother with a cop's instinct. Born and raised in Las Vegas, Catherine was a stripper before being recruited into law enforcement and training as a blood-spatter specialist. Following Grissom's departure during the ninth season of the series, Catherine is promoted to supervisor. After overseeing the training of new investigator Raymond Langston (Fishburne), Willows is replaced by
Pilot (CSI: Crime Scene Investigation) mold of his own hand. Grissom realizes that the suspect used one of these hands. Nick Stokes arrives at his crime scene and meets a man who was drugged by a hooker and had his possessions stolen while he was unconscious. Nick notices a discoloration around the man's mouth that he thereafter ties up with another caseload, Kristy Hopkins, who accidentally crashes her car when she got knocked unconscious while driving. He notices the same discoloration around her nipples and realizes that she put scopolamine on her nipples to knock out her victims and steal their possessions. Catherine and Warrick