Crime procedural have long been a staple of prime time television. In a crowded TV landscape like the Peak TV we’re in now, crime shows remain a familiar draw for viewers. There is an easy-to-tweak formula that networks can replicate over and over again. This formula is how we end up with so many TV police tropes, including ripped-from-the-headlines police, psychic police, detectives in a certain location, crime scene unit officers, law enforcement teaming up with mathematicians, federal agencies enlisting cutting edge technology, and goofball police all crowding the TV Guide with their antics.
But as the political climate shifts more and more divisively, show runners need to start being more aware of the moral predicaments their heroes are thrown into — and what that means as a reflection (or not) of modern policing.
Source: 
Zosha Millman 