Signing up to help communities seems pretty responsible to me. Committing crimes and disobeying cops... not responsible at all.Extremely rare and it's the risk you sign up for to be a police officer.
This hyper-rare incident is just what we'll have to accept, in order to avoid police killing unarmed/non-resisting civilians. I'll take a 1 in a billion tragedy over several per year tragedy, every day of the week.
Don't like that? Don't sign up. Personal responsibility