According to Wikipedia,
William Louis Petersen is an American actor. He is best known for his role as Gil Grissom in the CBS drama series CSI: Crime Scene Investigation , for which he won a Screen Actors Guild Award and was nominated for a Golden Globe Award; he was further nominated for three Primetime Emmy Awards as a producer of the show. He reprised his role as Gil Grissom in the sequel CSI: Vegas, which premiered on October 6, 2021.
William Petersen is affiliated with the following schools: