There is no national body that oversees police, but Chicago has the Independent Police Review Authority. However IPRA rarely upholds complaints against police (it&#x27;s staffed by ex-cops and other people connected to the police), and recently an investigator was fired after finding a shooting unjustified[1].<p>[1] <a href="http:&#x2F;&#x2F;www.wbez.org&#x2F;news&#x2F;city-fires-investigator-who-found-cops-fault-shootings-112423" rel="nofollow">http:&#x2F;&#x2F;www.wbez.org&#x2F;news&#x2F;city-fires-investigator-who-found-c...</a>