The father of a teenage boy accused of killing four people at a high school in Winder, Georgia, has been charged with several offences including second degree murder, authorities said on September 5.Colin Gray, has been charged with four counts of involuntary manslaughter, two counts of second degree murder and eight counts of cruelty to children, the Georgia Bureau of Investigation (GBI) said.His son, 14-year-old Colt Gray, was charged with four counts of murder, accused of opening fire at the Apalachee High School in the city of Winder.The shooting on Wednesday killed two teachers, two students and injured nine other people.“These charges stem from Mr [Colin] Gray knowingly allowing his son Colt to possess a weapon,” GBI Director Chris Hosey said.“You all have likely seen reports of incidents of other students making threats today at various schools around our state. In each of these incidents police, law enforcement took charges they made arrests , acted very swiftly as we take incidents like this very seriously across this state,” he added.The victims were identified as students Mason Schermerhorn (14) and Christian Angulo (14), and teachers Richard Aspinwall (39) and Christina Irimie (53).The nine people who were wounded in the shooting were all expected to make a full recovery County Sheriff Jud Smith said. Credit: GBI via Storyful