First picture of 14-year-old Colt Gray suspected of killing four in Georgia school shooting

Police have released a picture of a teenager suspected of shooting dead four people in the US state of Georgia.

Two teachers and two students were killed in the attack at Apalachee High School in Winder, 50 miles northeast of Atlanta, on Wednesday.

Colt Gray, 14, surrendered when “engaged by school resource officers inside the school”, Barrow County police said.

Neither body camera videos nor audio will be released to “protect the integrity of the investigation”, the sheriff’s office said.

Nine others – one teacher and eight students – were wounded in the shooting. They remained in hospital on Thursday, NBC, Sky News’s sister station reported.

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What we know about Colt Gray

Gray has been charged as an adult over the deaths of students Mason Schermerhorn and Christian Angulo, both 14, and teachers Richard Aspinwall, 39, and Christina Irimie, 53, according to Chris Hosey, director of the Georgia Bureau of Investigation.

He is due to make his first court appearance on Friday.

Detectives are trying to piece together how the teenager apparently obtained a semi-automatic rifle.

Following a tip off from the FBI, Gray and his father were interviewed last year in connection with online threats about a school shooting made on the gaming platform Discord.

They denied making the comments, investigators have said.

The case was closed after neither Gray could be connected to the Discord account, while no grounds were found to confiscate the family’s guns, according to police reports released by the sheriff’s office.

“This case was worked, and at the time the boy was 13, and it wasn’t enough to substantiate,” Jackson County Sheriff Janis Mangum said.

“We did not drop the ball at all on this. We did all we could do with what we had at the time.”

Gray’s father told officials he had hunting guns locked in a safe in the house and his son did not have access to them.