Oakland County Prosecutor Karen MacDonald holds a news conference on the recent school shooting investigation.

The suspected shooter, 15-year-old sophomore Ethan Crumbley, pleaded not guilty to charges of terrorism and first degree murder with his parents also being charged with involuntary manslaughter.

Mrs McDonald’s office filed the charges against James and Jennifer Crumbley.

Mr Crumbley is alleged to have killed four students and injured eight in the mass shooting at a suburban high school in Michigan on Tuesday afternoon.

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