It is evident from the get go that the writers wanted to make a political statement with this episode even though the writers obviously lacked the actual knowledge to make this realistic. They manufactured events that are not possible. The gun was not stored with a magazine loaded. At best one round could be chambered but the child has already pulled the trigger and expended this option before his brother returns. The parents had this fire arm for self defense and had it locked away. This is exemplary not criminal.