Niagara Regional Police are investigating an alleged assault at the Mountainview Centre for Innovative Learning in Welland.
Police say concerns were raised about a mental health counsellor using restraint techniques outside their training on a student at the Pathstones operated school, which supports children with mental health and learning challenges.
Investigators say the force used amounted to assault.
22-year-old Madison Porkolab of Grimsby has been charged with one count of assault and released with a future court date.
Detectives believe there could be more victims and are asking anyone with information to contact Niagara Regional Police.
(Written by: Brandon Warby)