HFSC says that's when it began investigating and resolving. Grissom and Sara investigate a sexual encounter from his past that he feels guilt and uncertainty about. We want to see everything through the prism of work. Start studying CSI Ch 11: Investigation of Sex Crimes, Assault, Child Abuse and Related Crimes. CSI: Crime Scene Investigation, also referred to as CSI and CSI: Las Vegas, is an American procedural forensics crime drama produced by CBS.