As with ALL Public Servants, (LOL), Retirement Pensions keep them in check, nothing more.Many big cities have managed to turn the sherif into a jail keeper and prisoner transporter and that it.
The local police are a personal police department of the mayor of the day.
So what keeps the police department from arresting to mayor and hold them until the trial is over and the depositions have started or last lest the first 200,000 illegal aleins have been deported.
Let me give my 2 cents on what's happening in Denver. Our family moved there in 1970. It was still basically a western cow town, very laid back but with strong values. In the early 70's Colorado, and particularly Denver was being invaded by rich Kalifornians looking for a New Tahoe, Vegas, that the New Rich could afford. Colorado has all the Liberal calling cards to pull in their money, multiple college towns, many reginal airports, great skiing and recreation, and Big Military and Big Tech. A liberal paradise, that had been kept as a good secret for many years. Once the word got out, it was over for Colorado. The Liberal Parasites and hanger on Cock Roaches killed it's great future. It's Never coming back to Paradise.