He might therefore have abandoned the attack entirely if he did not expect to be able to commit a shooting massacre in the Abraham Hall.
Speaking to a social worker after the shooting Bissonnette said that he had dreamed of committing a mass shooting since he was a teenager and said he regretted "not killing more people" because they were in heaven while he was in hell.
But as the behaviour becomes more and more complex, from getting in a fight to murdering someone to committing a mass shooting, the behaviour becomes rarer and much more difficult to predict".
For some young people, school shooters have become heroes, and authors have speculated that committing a school shooting threat in particular becomes a way to show sympathy and admiration for the school shootings [ 25].
Haydon said: "This is an elevation of complexity... committing a drive-by shooting, acquiring a firearm, silencer and ammunition, in broad daylight targeting police, military and members of the public before making their getaway".
Commander Dean Haydon, Scotland Yard's head of counter-terrorism, said: "This is an elevation of complexity … committing a drive-by shooting, acquiring a firearm, silencer and ammunition, in broad daylight targeting police, military and members of the public before making their getaway".
A week ago today, more than 100 police officers swarmed the breezeways and playgrounds of the Stapleton Houses, looking for men whom they accuse of committing a terrible crime: shooting two police officers in the head, then dumping their bodies on a nearby street corner.
Police in southern Colorado confirmed on Friday they had uncovered an alleged plot by two teenagers to commit a school shooting, just a week after a student opened fire in the halls of a suburban Denver high school.
Authorities are considering charging Salman, Mateen's second wife and the mother of his child, if she knew about Mateen's plans to commit a mass shooting.
Earlier in the day, Moore had posted on social media that he intended to commit a mass shooting, but a handwritten note found on Moore's body said he had changed his mind and wanted to kill himself.
