Patrolman Thomas Joseph Dietzman Jr., 34, died on August 16, 1985, after being struck in the back of the head by a single round during a firearms qualification at the Aurora Police Department’s firing range. Dietzman, a five-year veteran who had just completed the physical agility portion and was the first applicant to begin the firearms test for a SWAT position, was hit when another officer’s MAC-10 automatically discharged during one of the scenarios.

The shooting was classified as an accidental shooting; no suspects were identified and no arrests were made. Dietzman was survived by his wife, son, and daughter.

Did anyone who trained at the Aurora Police firing range in 1985 have recollections of the SWAT tryouts that day or details about range safety procedures that might shed light on what happened?