On Wednesday, police in Detroit discovered the body of a 7-year-old boy who had apparently killed himself after being bullied and harassed by students at his school.

The boy, who is not being named, hung himself with a belt from his bunk bed while his 14-year-old sister watched helplessly through the locked door’s keyhole.

While there’s no indication he was gay, it does appear he was bullied in part because of his perceived sexual orientation.

The boy’s mother told authorities her son “had been depressed due to her recent separation from his father; the fact that he had been bullied continuously by the children at school, in addition to the constant teasing that he had endured because he was the only boy in the home of eight females.”