The Osaka School Massacre (The Janitor Who Died Twice)

The Osaka school massacre was a mass murder that occurred at Ikeda School in Ikeda, Osaka Prefecture, Japan on 8 June 2001, in which Mamoru Takuma, a 37-year-old ex-convict with a history of mentally disturbed and anti-social behavior, stabbed eight students to death and seriously wounded fifteen others in a knife attack that lasted several minutes. Takuma was sentenced to death in August 2003 and executed in September 2004.

What makes the story more bizarre that Takuma claimed in his defence that he was on JAL flight 123 one of the worst single engine crashes in air history and that he had been abandoned on the mountain by rescuers and seeing the torn off body parts around him had caused his mental illness and eventual mass murder spreee. And it didn't end there, his defence believed him and said he had proof.