There wouldn't be an arrest report. Just a coroners receipt.
Both the good guy and bad guy are moving...bad guys at full speed falling down...
Not sure caliber would have made any difference. Very few people get to practice moving shots, particularly when both parties are moving, adrenaline pumping etc. It is hard to hit someone. He got one in the arm, and the other twice near center of mass (leg & hip). a 10mm hitting arm, leg and hip would not necessarily be fatal depending on angle of entry.
Our good guy was controlled throughout...amazing!!!