There was a full investigation, and the shooting was justified. When you're shooting at a man who is point a gun at you, a man that has already killed on officer and wounded another, you fire until you're empty, and then reload if he's still breathing.
As to accuracy, it wasn't like all the officers had a bead on the guy. They were in the woods, probably using trees as shields, and they weren't all that close, plus most were using handguns, not to mention they were shooting at a human being, not a paper target. All things considered, the accuracy was pretty good.