The mother of the teenaged boy 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 Gray’s 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 family’s 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 an AR15-style rifle. Their attorneys declined to immediately seek bail during their first court appearance on Friday. The Georgia teenager had struggled with his parents’ separation and taunting by classmates, his father told a sheriff’s investigator last year when asked whether his son posted an online threat. Those slain at Apalachee on Wednesday were identified as Mason Schermerhorn and Christian Angulo – both 14 – and mathematics instructors Richard Aspinwall, 39, and Cristina Irimie, 53. Their killings renewed the American public debate about safe storage laws for guns while also prompting parents to ponder how to talk to their children about trauma and school shootings, which occur in the US at a disproportionate rate.