Ethan Crumbly walked out of a toiletr...pulled a gun from his backpack at school and killed four students. His mother Jennifer...was found guilty of involuntary manslaughter.
She allowed it to happen....She's the Parent. Her husband and father to the killer is facing the same charges. He's the Parent.
THEY weren't at the school.
THEY didn't pull the trigger.

Can this be any more clear.