My dad was a teacher and as such, was a mandatory reporter. He had a student in his seventh grade class who never bathed or put on clean clothes to come to school. The students complained about her smelling bad.
My dad had one of the female teachers talk to her, and even though the student was vague about things, she let enough information slip to file an abuse report.
Turns out, the child's parent had a lousy boyfriend living with them, and he had been molesting her. Her staying dirty kept him from bothering her. It was very sad. The mother and boyfriend were arrested and the child was sent to her grandparents.
The mother made bail and came storming up to the school to find out who filed the complaint, but the assistant principal told her the child was so filthy, it could have been anyone who had her in a class.