The Georgia Butcher, colt gray, apologized to his mother before killing four people – prompting her to make desperate phone calls in an attempt to prevent the tragedy, according to his grandfather.

In an exclusive interview with the New York Post, the shooter’s grandfather Charles Paulhamus said his daughter, Marci Gray, was visiting him at his home in Fitzgerald, Georgia, when Colt sent her a terrifying text.

“I’m sorry, mom,” wrote the message.

Marcy, 43, made desperate calls to Apalache High School, alerting a school counselor of an “extreme emergency,” a relative told the Washington Post.

Marcy Gray

“I was the one who alerted the school counselors at the high school. I told them it was emergency, and immediately go to find [τον γιο μου] to check on him,” she told her sister, according to the report.

After receiving Colt’s message, Marcy raced to her car to drive to Winter, about three hours away, and heard halfway that two students and two teachers had been killed, Paulhamus, 81, told the New York Post.

Marci Gray appeared devastated on Saturday when she was spotted at her father’s home.

“It’s horrible. It’s absolutely horrific,” she said, declining to share more details about the bloodshed.

After Marcy Gray’s panicked call, school officials appeared to be scrambling to prevent disaster, Gray’s sister Annie Brown and another student told the Washington Post.

Colt Grey