William Louis Petersen  is  best known for playing Dr. Gilbert “Gil”
Grissom on the CBS-TV series CSI:Crime Scene Investigation. He
also starred in the first Hannibal lecter film, Manhunter in 1986.

William Petersen in Manhunter

Petersen played a secret service agent (above) in William Friedkin’s
1985 action film To Live and Die in L.A.