A mother has spoken up about turning her son into the police after suspecting him of launching an attack at his high school.

In 2019, Nicole Schubert, 41, called law enforcement on her teenage son after she found the then 17-year-old's journal was filled with a "descriptive" plan to commit a mass shooting at his high school in Washington.

The son's meticulously detailed plan began with expressing a desire to kill his own mother first before launching an attack at his school.

Almost two months after 21 people lost their lives at Robb Elementary School in Uvalde, Texas, Schubert spoke with Good Morning America about how she made the difficult choice to not just save the lives of others, but her son's too.

Watch her interview below:

[[youtubewidget||https://www.youtube.com/watch?v=L0ULirB5F-Y]]

In the journal, Schubert's son wrote about carrying out a mass shooting on April 20, 2020, on the 21st anniversary of the Columbine shooting, according to The Wall Street Journal.

He planned to begin at 5:00 AM that morning by murdering his mother and her boyfriend and then would head into his school at 12:20 PM later that day.

According to a police report, he wrote: "Kill everyone possible, fight to the death or kill self after maximum damage has occurred."

After discovering his notebook in September 2019, Schubert was heartbroken after reading what her son was writing about her, saying: "That's my child, I gave birth to him. It hurts a lot, it still hurts."

She later confronted him about his words, and the teen alleged that his notes were "just a story" however, Schubert still called the police.

The mother explained that although her "first instinct" was to protect her child, she believed that her son would have been "safer in jail" if he followed through on the alleged plans in the diary.

"If there's a possibility to save even one person, one child, I think it's worth it," Schubert said. Though her son - now 20 - still remains upset with her, she said his life is back on track due to the intervention.

He pleaded guilty to misdemeanors for harassment and a felony charge of threatening to bomb or injure property. He later underwent a mental evaluation and completed a rehabilitation program and community service for his crimes.

[[imagecaption|| Mourners gather at a memorial of flowers at Robb Elementary School in Uvalde, Texas on Monday, May 30, 2022. Credit: UPI / Alamy.]]

Following the recent mass shootings, Schubert said she has "no regrets" about turning him in. She also decided to share her story to help parents who might find themselves in similar situations.

"Stay in their business," she urged, "even if they don't like it. They're not gonna like it, but as parents, it's our job to know what our kids are doing. Just be aware, and watch for signs. Kids will normally tell you by their actions when something is wrong."

She further explained: "Obviously we can't control our children's actions all the time, who can? But there are signs that you know something's not right... I was in his room [asking] 'what are you doing, where are you going?' all the time, and he hated it, but he's alive, and everyone's alive."

Since completing his evaluation, the 20-year-old is now said to not have had any issues with the law and has since got a job and made plans to go to university.

Featured image credit: Marko Subotin / Alamy

Mom turns her own teen son in to police after fears he might launch an attack on school