Ironically, he might have been able to mount a decent case if he had kept a baseball bat in there, instead of a weapon designed solely for that purpose. A tyre iron would have been even easier to justify.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'