The mother of the 14-year-old who has been charged with murder over the fatal shooting of four people at his Georgia high school called the school before the killings, warning staff of an extreme emergency involving her son, a relative said.

Annie Brown told the Washington Post that her sister, Colt Grays mother, texted her saying she spoke with a school counselor and urged them to immediately find her son to check on him.

Brown provided screen shots of the text exchange to the newspaper, which also reported that a call log from the familys shared phone plan showed a call was made to the school about 30 minutes before gunfire is believed to have erupted.

Brown confirmed the reporting to The Associated Press on Saturday in text messages but declined to provide further comment.

Colt Gray, 14, has been charged with murder over the killing of two students and two teachers at Apalachee High School in Barrow County, outside Atlanta, on Wednesday. His father, Colin Gray, is accused of second-degree murder for providing his son with a semiautomatic AR 15-style rifle.

Their attorneys declined to immediately seek bail during their first court appearance on Friday.

Investigators previously interviewed the suspects

The Georgia teenager had struggled with his parents separation and taunting by classmates, his father told a sheriffs investigator last year when asked whether his son posted an online threat.

I dont know anything about him saying (expletive) like that, Gray told Jackson County sheriffs investigator Daniel Miller, according to a transcript of their interview obtained by the AP. Im going to be mad as hell if he did, and then all the guns will go away.

Jackson County authorities ended their inquiry into Colt Gray a year ago, concluding that there wasnt clear evidence to link him to a threat posted on Discord, a social media site popular with video gamers. The records from that investigation provide at least a narrow glimpse into a boy who struggled with his parents breakup and at the middle school he attended at the time, where his father said others frequently taunted him.