What infuriates some LEOs is when I tell them the only difference between them and me is that they can issue traffic citations and conduct misdemeanor investigations/arrests.
I love correcting them when they say "civilians" (unarmed combatants in war zone) and tell them to say "citizen". A BIG difference.
Here in the state of Washington you can even make a citizen’s arrest for a misdemeanor if you witness it. (Probably why you said “investigations”)