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Lehouillier, who was 19 at the time of the May 18 collision, initially faced 12 charges.

His lawyer, Christopher Avery, says a sentencing hearing is scheduled for February.

Police alleged Lehouillier, of Georgetown, Ont., was speeding as he exited Highway 401, lost control and slammed into a minivan carrying a mother, her four children and a male acquaintance of the family.

Two of the children — 15-year-old Ramone Lavina and his 13-year-old brother Jace — died at the scene, while their six-year-old sister Mya died in hospital a short time later.

The mother, Jade Galve, her 10-year-old child Avery and the male driver were taken to hospital in stable condition.

The children's identities were initially protected under a publication ban, which was eventually lifted.

This report by ºÃÉ«tvwas first published Dec. 16, 2025.