One bad decision after another here. This guy should have been shown the door. He saw it going on and turned around and let it finish. He didn't call the cops. He told his boss the next day*.
*and this puts him in the clear, apparently.
One report said the boy saw him witness the incident. What do you think that kid thought when a should-have-been-rescuer turned his back and walked away? I'm sure it wasn't, "Good, he's probably going to go tell JoPa".