I can't speak for any agency but the one I work for, a mid-size municipal force. We average somewhere around 12 or 13 internal investigations a year. Some years more, some less. A fair number of those are the result of citizen complaints which couldn't be handled directly between the sergeant and officer involved. Some things that fall into the sergeant's realm might be an isolated incident of rude conduct, questions about an officer's driving, or sometimes why a call was handled in a certain way. Some violations of the department regulations might be handled with discipline from the sergeant directly, or through regular disciplinary channels without an internal investigation while others would require investigation. Many of the IAs that do take place are the result of interal complaints, observations, or reports. Some are automatic results of police actions, like serious uses of force. An IA has three dispositions: Unfounded, Justified, or Sustained. Unfounded indicates that there was no violation or infraction. For example, an officer was accused of speaking rudely to someone, but they never actually had contact. Justified means that something did happen -- but was within the bounds of policy. Perhaps the officer did speak rudely to the person, but it was because they ignored more polite requests to return to their house. Sustained means there was a violation -- and usually means discipline will follow. The officer, for some unfathomable reason, really did curse out a 90 year old grandmother who did nothing wrong.
I've been the subject of several IAs in my career... and expect to be the subject of more. I'm a proactive, reasonably aggressive cop; I'm going to sometimes piss someone off or do something else that might get investigated. I study the law, the regs, and more, so that I can be as confident as possible that I don't have anything to worry about.
Most IAs in my department are cleared either unfounded or justified. A few do lead to disciplinary action. And, as I said a bit earlier, sometimes disciplines occur as the result of non-IA cases.
You seldom see most of the disciplinary actions that occur at most jobs; you don't know if the clerk at the cash register where you bought your lunch was written up for being late, or failing to wash their hands, or whatever. Most PDs do report the overall results of their internal affairs function to the local government; it varies widely whether this report becomes a public matter or not. You could also FOIA some of these records...
I've been the subject of several IAs in my career... and expect to be the subject of more. I'm a proactive, reasonably aggressive cop; I'm going to sometimes piss someone off or do something else that might get investigated. I study the law, the regs, and more, so that I can be as confident as possible that I don't have anything to worry about.
Most IAs in my department are cleared either unfounded or justified. A few do lead to disciplinary action. And, as I said a bit earlier, sometimes disciplines occur as the result of non-IA cases.
You seldom see most of the disciplinary actions that occur at most jobs; you don't know if the clerk at the cash register where you bought your lunch was written up for being late, or failing to wash their hands, or whatever. Most PDs do report the overall results of their internal affairs function to the local government; it varies widely whether this report becomes a public matter or not. You could also FOIA some of these records...