under the assumption that the shots were fired by crooks…
I still find it amazing that the evidence photos of the fast buriers of information do not show any magazine(s), ammunition boxes, not even some food or a bottle of water or alike from the backpack…
if crooks fired the 5 shots, I think he had only 5 rounds in the magazine: in his rapid fire mode, 5 shots were fired in under a second, then there was a pause of about 1 second before shot 9 came in and interrupted whatever he was doing on that roof…
bullet 9 did not stop the rapid fire burst, as it had stopped already, and bullet 9 did not injure him significantly, as he was still more or less physically intact to sit upright on the roof, face the crowd to his right and point the rifle at them…
and in my view of the following picture, the stock of his rifle is still intact while pointing it at the crowd, moments before swallowing bullet 10:
the damaged stock has very sharp edges and I would be very surprised if he kept these sharp edges so close to his face:
