Sergeant Nencki was shot and killed after responding to a call of a suspicious salesman in a neighborhood. Unbeknownst to Sergeant Nencki, the salesman was also wanted for murder. As Sergeant Nencki approached, the suspect produced a pistol and shot him in the abdomen. The suspect was then shot and killed by a detective who had also responded to the call. Sergeant Nencki had been with the agency for 11 years.