The LaSalle Police Service has identified the youth responsible for writing a threatening message in a bathroom at Sandwich Secondary School.
The message threatened a school shooting on Friday, October 18.
Investigators said the youth responsible came forward and will be held accountable under the Youth Criminal Justice Act.
LaSalle police will continue to have a visible presence at the school Friday as a precautionary measure.
"We want to emphasize that making or sharing threats of any kind is unacceptable. The police will thoroughly investigate such incidents and pursue charges when warranted. The safety and security of our community remain our top priority," said Constable Terry Seguin in a news release.
Anyone with information regarding this investigation is encouraged to contact the LaSalle Police Service at 519-969-5210.