The father of a Georgia teenager who killed four people at his high school in 2024 was sentenced Thursday to 15 years in prison for his role in the mass shooting. Colin Gray, 55, was convicted in March on 27 counts after a jury found him criminally responsible for the shooting his son, Colt, carried out at Apalachee High School in Winder, Georgia. Prosecutors said Gray gave Colt, then 14, access to the firearm and ammunition used in the shooting, despite warnings that his son might harm others. Two days earlier, the same judge sentenced Colt Gray, now 16, to life in prison without the possibility of parole. Parents charged in school shootingsGray became the third parent convicted in connection with a school shooting carried out by their child.