When did this change happen? Is there some evidence that it would be the cause?
https://www.startribune.com/minneapolis-police-staffing-leve...
" was a warning to the public as well, criminologists say, with Lynch alluding to the "Ferguson effect" argument, in which police pull back on acting, leading to a work slowdown because of criticism or administrative decisions perceived to endanger their well being on the streets."
https://www.nbcnews.com/news/us-news/police-union-suggests-w...