On September 29, 2025, police conducted a home search in Vantaa, Finland, where they uncovered a troubling text file on the computer of an 18-year-old boy. The file, ominously titled "Revenge and Attack," contained a manifesto in which the teenager expressed intense anger towards various groups of people and outlined a plan to return to his former school with a knife, intending to harm or kill as many individuals as possible before surrendering to the police. He indicated a preference for using a rifle or handgun instead but lamented the strict gun control laws in Finland that limited his options.

The investigation revealed that prior to the search, the teenager had been watching videos about mass shooters and terrorists, including the infamous Anders Breivik. This raise significant concerns about his mental state and the motivations behind his aggressive intentions. The details of the manifesto revealed that he targeted his former school, primarily because he perceived most of its attendees as "leftists" and felt comfortable navigating the premises.

This incident has alarming implications for public safety and youth mental health in Finland, prompting discussions about the effectiveness of current mental health interventions and the need for preventive measures to address such violent ideations among young individuals. The police action highlights the importance of vigilance in monitoring online behavior and the potential risks it poses, emphasizing a societal responsibility to prevent youth from feeling isolated and resorting to violence.