The father lets his kid fire a mini-Uzi and then sues the show when the kid loses control of the gun and shoots himself. The gun show ought to be suing the father. This reminds me of the Remington 700 lawsuit where the mother shot her son and the parents are suing Remington, while it was her unsafe gun handling that killed her son.
The father should be brought up on charges. Period. End of story. I wouldn’t even fire an Uzi much less any kid. Those things are animals to handle.