Colin Gray was sentenced to 15 years behind bars over his role in the deaths of four people (Picture: The Atlanta Journal-Constitution/AP)The father of teenage school shooter Colt Gray has demanded a new trial less than a week after being sentenced to 15 years behind bars. Colin Gray, 55, was convicted back in March over his role in the deaths of four people who were shot and killed by his son at Apalachee High School in Georgia. The dad had gifted his son the semiautomatic rifle and ammunition that was used in the massacre. All four were killed when Colt, then just 14 years of age, opened fire at Apalachee High School on September 4, 2024. Colin Gray didn’t do anything to anyone at that school.’