Your son's toxic girlfriend is killed, and he goes out for revenge.

Your son is 16 and is in a toxic relationship with a 21-year-old college girl. They do drugs together, and she's overall toxic, somewhat abusive, and manipulates him. Your son overdoses on a drug, but it gives him special abilities like super senses similar to Marvel's Daredevil. Her ex-boyfriend is a gangster; he has her killed. Your son gets the guns and vows to kill every single person involved, vigilante-style.

Before his girlfriend died, she drew him a picture of him as a superhero along with a superhero name. Your son drew the costume and adopts the name to honor her. What do you do, and how do you react?