The trial has started for a man whose teenage son is accused of killing two students and two teachers at a Georgia high school in 2024. Lawyers gave opening statements Monday in the case against Colin Gray. Prosecutors say Gray gave his son, Colt, access to a gun and ammunition despite warning signs. They link that decision to the four deaths at Apalachee High School. Investigators say the 14-year-old planned the attack and brought a rifle in his backpack. Gray's attorney says his client wasn't told about the planning and timing of the shooting and shouldn't be held criminally responsible The trial is being held in Winder, where the shooting happened, with jurors from nearby Hall County.