he ran away into the crowd while lifting his rifle into firing position.

So, I haven’t followed or heard of this story before, and I cannot say what happened before and after the video in the article, and what info is available outside of this article - but at the moment of the first shot, this clearly was not the case. The video shows him in all black and walking, not running, with his rifle in front, but not raised. The shooter already is in an aiming position at this point, there is nothing audible and no one around the happenings acts like there were instructions or warnings being shouted.

I will give them, that it may have been still a hard to decipher situation, and I cannot say anything about the other claims (preparing the rifle behind a wall) - but at least the whole “running at them with rifle in firing position” was either happening at another time, with them not shooting, or not happening in the way described at all.

So, yeah, their story does not check out as told, could be a whole slew of reasons, but this does not feel like an easy “it was his own fault” situation.

EDIT: Note that the second video in the article (the dashcam one) won’t load for me, so I can’t comment on that one