The law in Augusta is that you must stop shooting a fleeing felon in the back once you've emptied your magazine.
http://www.detroitnews.com/story/news/local/macomb-county/2016/08/22/eastpointe-shooting/89104534/ No charges will be filed.
I don't agree with it. He's liable for any portion of the crime committed by any of the group, but not for the death of his fellow criminal. You pays your money, you takes your chances.