The jury has found Colin Gray, the man whose teenage son is accused of killing two students and two teachers in a shooting at Georgia's Apalachee High School, guilty of second-degree murder and all other charges. His prosecution marks the third time a parent has been charged for their connection to a mass shooting allegedly carried out by their child. 60 Minutes' Sharyn Alfonsi examined the landmark prosecution in Michigan, where the parents of the shooter at Oxford High School were convicted in 2024 and sentenced to at least 10 years in prison. In both cases, investigators say there were clear warning signs before the violence and that firearms were made accessible by parents. #schoolsafety #gunviolence #violenceprevention