A mother is on trial for her son's school shooting in Oxford, Michigan. Prosecutors argue that she could have prevented it, while the defense portrays her as a vigilant mother unaware of her son's troubles. The shooter, Ethan Crumbley, killed four students and injured seven others. The trial reflects a trend of holding parents accountable for their children's deadly actions. The mother faces involuntary manslaughter charges, accused of failing to act on signals of her son's violent intentions. The defense claims she was unaware of the alarming signs and that the family faced death threats, prompting their flight. The trial's opening witness, a teacher at the school, emotionally recounted the day of the shooting.