Sounds like he murdered the suspect and made up a story to cover his ass.
“Hesselbein was shot Jan. 30 after his wife called police to report he was drunk and abusive. His cheek was grazed by the rifle round.”
Not murdered.
The suspect was probably impolite and gave the officer no choice but to shoot him while handcuffed in the police car.
There is no way for this shooting to be justified.