PONTIAC, Mich. (AP) — A prosecutor has filed involuntary manslaughter charges against the parents of a 15-year-old accused of killing four students and wounding seven other people at a Michigan high school.

James and Jennifer Crumbley were charged Friday with four counts each.

Authorities have said Ethan Crumbley opened fire shortly before 1 p.m. Tuesday at Oxford High School, roughly 30 miles (50 kilometers) north of Detroit. Seven students and a teacher were shot before Crumbley surrendered to sheriff’s deputies.

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