CSI: NY (2004)

S05E18 Point of No Return

Title: Point of No Return Plot: The shocking murder of a former medical examiner's wife sends ripples through the community. As the CSIs delve into the investigation, they uncover a crucial clue at the crime scene: a mysterious white powder. Their analysis reveals that the substance is heroin derived from human remains, pointing them toward a chilling and twisted path in their pursuit of the killer.