It's a low bar, but all the copaganda shows (CSI, Castle, Brooklyn 99, Bones, etc) for obvious reasons. Even the heckin' wholesome funny NYPD detectives in B99 talk about defense lawyers being scum, all suspects being guilty (otherwise they wouldn't be suspects, would they?) and of course even when they did touch on the rampant racism in the NYPD the solution was "be a better pig and change from the inside!" (Don't laugh!). I could go on about the others too, but it's a topic that's already been covered better by other people
Long post short, even light-hearted cop shows where Malcolm Reynolds plays a goofy man-child writer have dogshit politics
Andy samberg found out that cops are bad after a decade of making a cop show and it's honestly pretty funny how they try to cram it into the last season
I was never a huge fan of cop shows, but when I studied computer forensics in college, damn near everyone there was someone who watched too much NCIS. Should've tipped me off that I should've switched majors, but I graduated with that anyways...
I almost studied forensic science in uni, going to an open day at one of the University of South Wales campuses and seeing every other person looking to study it was an NCIS fan was what ultimately led me away from that path and towards studying biomed.