The father of the teenager accused of killing two students and two teachers at Apalachee High School in Georgia entered a not guilty plea Thursday morning.

The plea was entered on behalf of his attorney, who waived a formal arraignment.

Colin Gray faces 29 counts, including second-degree murder, involuntary manslaughter and reckless conduct.

Arrest warrants say Colin caused the deaths of others “by providing a firearm to Colt Gray with knowledge that he was a threat to himself and others.”

Colt Gray, 14, is accused of opening fire on Sept. 4 using an assault-style rifle he hid in his book bag.

He was indicted on a total of 55 counts, including four counts of malice murder, four counts of felony murder, plus aggravated assault and cruelty to children.

Because Colt is a juvenile, the maximum penalty he would face is life without parole.

The victims were identified as Mason Schermerhorn, a 14-year-old student; Christian Angulo, a 14-year-old student; Richard Aspinwall, a teacher; and Christina Irimie, another teacher. Nine others were injured.

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