On May 8, 1986, Captain Malcolm Grass, 43, a 14-year veteran of the Hancock County Sheriff’s Office, was fatally shot in Greenfield, Indiana while assisting the FBI in an extortion investigation. Officers and agents had converged at a local Amoco gas station to confront a suspect. As law enforcement moved to arrest the man, he produced a .357-caliber handgun and opened fire. Captain Grass was struck in the head and was taken to a hospital in Indianapolis, where he died about an hour later. He left behind a wife and two sons.

The suspect, identified as 45-year-old Marvin D. Castor, was arrested at the scene and charged with murder. Castor was convicted of the murder of Captain Grass and received the death penalty; that sentence was later overturned and the case was remanded for resentencing. If anyone knew Captain Grass, the events that day at the Amoco, or has information about the case, please share what is known.