Overview

• James Crumbley, father of the Michigan school shooter, was found guilty of four counts of involuntary manslaughter, joining his wife Jennifer Crumbley who was convicted last month.
• The verdicts are seen as setting a precedent for holding parents accountable for their children's actions in cases of mass shootings.
• Prosecutors argued the parents were grossly negligent in securing the firearm and ignoring their son's mental health issues.
• The Crumbleys are set to be sentenced on April 9, facing up to 15 years in prison.
• Experts say the convictions could potentially set an important precedent, but such cases remain uncommon.