I need help with get+phrasal verb in this context:

(This is said by a chief to his detectives on a briefing before starting an investigation)

''If somebody comes up that we should look at, I want a call on my radio. I don't want any suspect falling down in custody or accidentally getting his head blown off.''

Does this mean that sb else would accidentally blow his head off or that he himself would accidentally blow his head off?
I know that this is said ironically because his detectives are prejudiced agaist the killer, and being a part of a small community they are likely to kill him/her without sufficient evidence.

Thank you in advance
The chief is being a bit sarcastic here. He is telling his men that he doesn't want any suspect beaten or killed, and is already denouncing their likely excuses were that to happen.
Thank you Young Californian!