They did all this amidst a huge public outcry, what do you think happens to some poor schmuck when no camera is around.
Like this[2] and this[3].........
EDIT: Here is one where the cop force the poor guy to grab his baton and leave his fingerprints so he can accuse him of whatever he wants[4].
EDIT2: What do you know "his death [Floyd's] is on their hands [protesters and looters] as much as it is those officers"[5]
[0]: https://www.cnn.com/2020/05/28/us/video-george-floyd-contrad...
[1]: https://www.motherjones.com/politics/2020/06/george-floyd-au...
[2]: https://www.washingtonpost.com/news/the-watch/wp/2018/07/27/...
[3]: https://www.nbcnews.com/news/us-news/black-woman-shot-killed...