On his birthday at Fredbear's Family Diner, the Older brother and his friends were picking on him. This leads to The Older Brother getting the idea to put his head close to Fredbear's mouth; once his head is in Fredbear's mouth he gets bitten not long after. He is critically injured, and thus brought to the hospital.

Here aomthing about crying child

Soo

And possed the animatronic haunting his brother

He died

Reall cool art!