In the 2006 Supreme Court of Canada decision of "Multani v. Commission scolaire Marguerite‑Bourgeoys" the court held that the banning of the kirpan in a school environment offended Canada's Charter of Rights and Freedoms, nor could the limitation be upheld under s. 1 of the Charter, as per "R. v. Oakes". The issue started when a 12-year-old schoolboy dropped a 20 cm (8-inch) long kirpan in school. School staff and parents were very concerned, and the student was required to attend school under police supervision until the court decision was reached. In September 2008, Montreal police announced that a 13-year-old student would be charged after he allegedly threatened another student with his kirpan. However, while he was declared guilty of threatening his schoolmates, he was granted an absolute discharge for the crime on April 15, 2009.