I can only speak on my experience here in LA with LAPD and what seems like the constant barrage of articles of excessive force that are written. In this city, our LE have a perception problem. This perception is not helped when non-emergency calls turn fatal. I won't say how but I do have a personal connection with the LAPD so I sometimes here inside information. That said, it seems that the LAPD along with many other LE agencies around the country are getting more and more militarized when violent crime is at it's lowest it's been in decades. Crime, specifically here in LA, is also at it's lowest rate in decades. So why the change in armament? Kind of makes you wonder.
Personally, I believe LE needs to be held to a very, very high standard, especially since they're being given the power of arrest and the ability to kill. Furthermore, I think they all need to be outfitted with body cameras.
Earlier in the year, the NYT wrote an article on a police force here in LA county being outfitted with cameras. The results of the "experiment" were not surprising.
https://www.policefoundation.org/content/body-worn-cameras-police-use-force
https://www.nytimes.com/2013/04/07/business/wearable-video-cameras-for-police-officers.html?_r=2&