Oxford Township (US), Dec 3 (AP) A prosecutor filed involuntary manslaughter charges Friday 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 with four counts each of involuntary manslaughter.

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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.

Three of the students died Tuesday. The fourth died Wednesday at a hospital.

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The semi-automatic gun used in the shooting was purchased legally by Crumbley's father last week, according to investigators.

“The parents were the only individuals in the position to know the access to weapons,” Oakland County prosecutor Karen McDonald said Thursday. The gun “seems to have been just freely available to that individual.”

She said then that the parents' actions went “far beyond negligence.”

Ethan Crumbley has been charged as an adult with two dozen crimes, including murder, attempted murder and terrorism. (AP)

(The above story is verified and authored by Press Trust of India (PTI) staff. PTI, India’s premier news agency, employs more than 400 journalists and 500 stringers to cover almost every district and small town in India.. The views appearing in the above post do not reflect the opinions of LatestLY)