A 43-year-old man named Thomas Hamilton entered a primary school in Dunblane, Scotland and murdered 16 children and one teacher with four legally owned handguns over 3-4 minutes before committing suicide. The document discusses how this real-life tragedy served as inspiration for the author's horror film about a troubled teenager named Jackson who goes on a killing spree at his high school after being bullied and rejected by his community, similar to how Hamilton felt. It also draws parallels between Jackson and Adam Lanza, who fatally shot 20 students and 6 teachers at Sandy Hook Elementary School in 2012, as both had troubled childhoods and mental health issues but were not officially diagnosed.