What do you want to bet that their statements will never shed light on what they did or how this happened? I bet they have lawyered up and the zoo and everybody in sight will be subjuct to a law suit!
There's going to be evidence of the stuff they threw in the cage. Some might even have finger prints on it. Then their will be finger prints on the bars where the kid(s) went over. Those prints will be facing the wrong way and appear above hte blood spatters on the inside of the cage wall. They'll also be cat scratches on the wall, where the cat went up.
The zoo will be able to show the cage was good enough for normal holding, but not for holding a taunted animal. These morons were yelling and tossing stuff at the cat, thinking the cat wouldn't be able to respond. I don't see cat cage engineers considering that scenario. Any lawsuit should be dismissed as frivolous.