William Petersen
William Louis Petersen (born February 21, 1953) is an American actor and producer, best known for playing Dr. Gilbert "Gil" Grissom on the hit CBS series CSI: Crime Scene Investigation, Richard Chance in the film To Live and Die in L.A., and as Will Graham in the film Manhunter.
Read more about William Petersen: Early Life, Career, Personal Life, Filmography, Production Credits, Stage Director