Ethan Crumbley, then 15 years old, killed four classmates from his high school in Michigan. The 12 jurors, who began their deliberations Monday morning at the court in Pontiac, Michigan, delivered their verdict early Tuesday afternoon.
Sentencing for Jennifer Crumblesy, 45, mother of Ethan, has been set for April 9. The father, James Crumbles, 47, is due to be tried separately in March. The parents are being prosecuted for manslaughter resulting from a failure in their legal duty.