The 18-year-old responsible for a horrific knife attack in Southport, England, will be sentenced today. Axel Rudakubana admitted to killing three young girls and injuring 10 others during a dance class last July.

The attack sent shockwaves across Britain and sparked riots fueled by false claims on social media. Some spread rumors that Rudakubana was an undocumented immigrant or asylum seeker, but he’s actually a British citizen born in Wales to Rwandan parents.

Court documents reveal that Rudakubana had a history of troubling behavior. Between the ages of 13 and 14, he was referred three times to Prevent, a British counterterrorism program, due to his fixation on violence. However, officials decided he didn’t meet the criteria for intervention.

Prime Minister Keir Starmer addressed the tragedy, calling it a grim reminder of how terrorism is evolving. He warned that young people are increasingly being radicalized by violent content online.

Judge Julian Goose, overseeing the case, has already indicated that a life sentence is unavoidable. The sentencing will bring a somber close to a case that has left a community in mourning and raised urgent questions about youth violence and radicalization.