No that's not the case. Frey (the mayor of Minneapolis) as of the 28th was calling for Chauvin's arrest and he wasn't charged until today. It wasn't a foregone conclusion if and when the arrest was going to take place.
https://www.startribune.com/shooting...est/570804062/
All Frey said soon after it happened was that the 4 officers were terminated.
That absolutely had to do with the ferocity of the actions taken.
It will happen again too if this guy isn't convicted. Similar to what happened during the LA riots when those officers got off.