This afternoon, we're learning the latest details in the investigation into that deadly Georgia school shooting. Four people died in that shooting, two students and two teachers. We're now hearing that a crucial call was made prior to the shooting. NB C's Priscilla Thompson has more this morning, chilling new details about the day. A 14 year old gunman opened fire at his Georgia high school NBC news has learned from the shooter's aunt that a half hour before the deadly shooting. The gunman's mother called Appalachian High School to warn them about her son in messages obtained by the Washington Post, Marcy Gray texted her sister about the call. I told them it was an extreme emergency and for them to go immediately and find my son to check on him at the high school. Took action the post reports but not in time to stop the shooting that killed four people. The accused shooter seen in court for the first time Friday in shackles, you were charged with four counts of felony murder. His father, Colin Gray also facing charges of involuntary manslaughter and second degree murder. Both pleading not guilty. You have weapons in the house are they accessible to him. They are, I mean, there's nothing loaded but they are down newly obtained audio from a 2023 interview with investigators revealing the father's reaction to allegations that his son made shooting threats online last year. Tony. Right now we talk about it quite a bit. All the school shootings, things that happened. Are you getting picked on at school? He is, he's getting picked on at school and is everything ok. That's why I keep going up there. Two law enforcement sources familiar with the investigation. Tell NBC news, the shooter received an AR 15 style rifle from his father after that 2023 interview. See this morning, the small town of Winder coming together to honor the lives lost. He was taken too soon. We were so devastated.