Shooting as the BG is leaving and no longer presenting an immediate threat seems like a tactic to avoid. IMNAL Each state has its own interpretation n of laws regarding the use of deadly force to stop a fleeing felon but I believe MI allows its use. . Although he may be off the hook criminally he may be on the hook for a civil suit . Either way the cost of a lawyer plus the time spent in custody and dealing with the aftermath especially if the BG dies is not worth it!
My motto is don't shoot for property