Almost 17 years ago, her son killed 13 people at Columbine High School in a mass shooting.
Sue Klebold has felt the guilt every day since, and has now spoken out about her “killer” son in her first TV interview.
In the ABC News interview with Diane Sawyer that aired on Friday, Klebold opened up about how her life changed after the horrific events that took place on April 20, 1999.
That was the day her son Daniel Klebol, and his friend Eric Harris committed the worst high school shooting in US history. Storming through the school in black coats and wielding four guns, they killed 12 students and one teacher, and injured 24 others before taking their own lives.
The two went on the rampage after a bomb they had planted in the cafeteria failed to go off.
Klebold spoke of the pain and responsibility of Dylan’s horrific actions. “There is never a day that goes by where I don’t think of the people that Dylan harmed,” she said. “I felt that I was a good mum… That he would, he could talk to me about anything.”
“Part of the shock of this was learning that what I believed and how I lived and how I parented was … an invention in my own mind,” Klebold continued. “That it was a completely different world that I was living in.”
“It is very hard to live with the fact that someone you loved and raised has brutally killed people in such a horrific way,” she said.
Klebold revealed that she still feels what the families who had lost loved ones in the massacre do. “ I keep thinking … how I would feel if it were the other way around and one of their children has shot mine,” she said.
“I would feel exactly the way they did. I know I would.”
Klebold today released a memoir called A Mother’s Reckoning: Living in the Aftermath of Tragedy, with the profits going towards mental health research.
VIDEO: Columbine killer’s mother breaks her silence