The GOOD thing is the shooter is 100% INTACT, and the 45 worked.
Sure we can say 44 this, 12g that, big rifle,...etc.... Maybe that's all he had?!
from article:
On Saturday, rangers found the dead bear about 100 feet from the shooting site.seems the 45ACP worked fine....

Park officials are determining the justification for the shooting. It's legal to carry firearms in that area of the park but illegal to discharge them. 
WTF???
Still trying to figure that one out,....