For those who work as LEO and constantly have to deal with hassles of justifying the use of force on non-compliant subjects, what's your recommanded style?

Striking styles (karate) seem to be quite inappropriate. But then styles like aikido also seem too complicated and I will be nervous to use it on the street.

So if you get to go back 30 years and choose to start in an art form that would help you in your LEO career, what style will it be?

Or... does such style even exist? (simple to use yet doesn't injure the uke)