Good find, Niteowl, thank you. That looks like a good match. I was going with the Scorpion because it was mentioned as a possibility in a news story.
There's one thing that bugs me - how would anyone (police or reporter) know the number of leftover bullets? It could be any number. I think some reporter guessed that "he shot until he ran out".
My guess would be that the killer was highly skilled, and not likely to run out of ammo. He had to be ready for any situation, including people shooting back at him (even though that didn't happen). So I'm guessing he had a large amount of leftover ammo. That seems more likely than zero.
There's one thing that bugs me - how would anyone (police or reporter) know the number of leftover bullets? It could be any number. I think some reporter guessed that "he shot until he ran out".
My guess would be that the killer was highly skilled, and not likely to run out of ammo. He had to be ready for any situation, including people shooting back at him (even though that didn't happen). So I'm guessing he had a large amount of leftover ammo. That seems more likely than zero.