The plaintiff, Deborah Tilli, brought an action for damages for personal injuries sustained in a physical altercation with another student, Erica DiTomaso, at school.
The action also alleged negligent supervision against the Hamilton-Wentworth Catholic District School Board and its teachers.
The court found no liability on the part of the school board, determining that its supervision policy met the standard of a careful and prudent parent for 15-year-old students.
However, the court found Erica DiTomaso liable for battery, concluding that while the initial altercation was a "consent fight," DiTomaso used excessive and unreasonable force by banging the plaintiff's head on the floor.
Damages were mitigated by the plaintiff's provocation (name-calling), resulting in DiTomaso being 60% responsible and the plaintiff 40% responsible for her injuries.