Number one thing: At the end of the day, the good guy won........
But many will argue that he was 'lucky' he was in Florida........ some of his shots could be seen as shooting at a fleeing perpetrator, particularly at the end.
My "Monday morning quarter-back, take it with a grain of salt" opinion is that as long as both perps are in the building, anything goes...because they could turn on you in a second and attack. At the end, after they had both went through the door, maybe he should have not taken the last shot.