Colt Gray, the 16-year-old accused of killing four and injuring more at Apalachee High School in Georgia nearly two years ago, has pleaded guilty to all 55 counts against him. Gray had previously pleaded not guilty in the Sept. 4, 2024, shooting at Apalachee High School in Winder, a small town about 40 miles northeast of Atlanta. WINDER, GEORGIA – SEPTEMBER 5: Students embrace near a makeshift memorial at Apalachee High School on September 5, 2024 in Winder, Georgia. (Photo by Jessica McGowan/Getty Images)Gray pled guilty to all 55 charges, including malice murder, aggravated assault and aggravated battery. Juries in Michigan convicted Jennifer and James Crumbley of involuntary manslaughter in 2024 after their son Ethan pleaded guilty to killing four students at Michigan’s Oxford High School in 2021.