Oregon school shooter was allegedly beaten by mother's boyfriend
Griffin John II, 16, had been assaulted twice in recent years - including once by his mother's boyfriend - before he opened fire at Silver Rail Elementary School in Bend, Oregon.

TL;DR
- Griffin John II, 16, killed three children and a teacher at Silver Rail Elementary School in Bend, Oregon.
- John had allegedly been assaulted twice in recent years: once by his sister's friend and again by his mother's boyfriend.
- Court records indicate John had a cognitive disability, a history of bullying, and a tumultuous home life.
- John's mother, Shauntai Nickerson, also had legal troubles, including assault accusations.
- The firearm used in the shooting was purchased by Nickerson and registered in her name.
- Kaylub Giamanco, a father of two, intervened and fatally shot John after witnessing the attack.
- Giamanco described his actions as a desperate attempt to save children inside the school.