I'm guessing that these corruption police are just for appearances, or to be used to get rid of anything that Putin himself labels as "corruption", since they work for him.
I would guess such a post is a pretty useful tool for Putin. Since everybody is corrupt in Russia, and that is an accepted fact, you always have some leverage over everybody with the looming threat of being charged for corruption if you happen to displease the czar.
Alexei Chernykh of Russia's anti-corruption police was killed while doing garden work at his country cottage in Shchetinovka, Russia - just 1,000ft from the Ukraine border.
If he was with the anti-corruption police, it might have been someone in the military (with access to drones) that he was investigating for corruption.
Or, and this might be a crazy theory, if he was only 1k feet from the Ukrainian border, maybe, just maybe, Ukraine got him, since he would be a high profile target and Russia is currently at war with Ukraine. He worked for Putin, so despite the "anti-corruption" title, the chances of him actually going after real corruption is slim to none. "Corruption" in this case probably just means "whoever Putin is mad at atm". Even if he was killed by his own team for whatever reason, the one behind it would most likely be Putin himself.
Man it would suck to be in any sort of military or political position there. Never knowing from day to day who you are going to piss off next or what window you are going to get pushed out of.