Police execute concrete gator

I'm baffled as to how between four police officers not one of them realized this was concrete BEFORE they started firing off their guns. Let us assume, for a second, that it was a live alligator. Even then I can't see why these trigger-happy Keystone cops would automatically have the gator killed. If gators are lying next to a pond best to leave them alone and get animal control to move them. Killing something really ought not be the first thing to come a cop's mind. It's not like its a family pet that has to be summarily executed anytime cops step on private property.