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A day after the Sandy Hook shooting, Von Mayer was arrested for allegedly threatening to "kill as many people as he could" at an elementary school near him. The Indiana resident owns 47 guns.
Whether he was serious or not, each gun-related tragedy the country sees appears to encourage other gunmen to be "bigger and better" than the last. With no federal laws in place preventing ownership of personal firearms, the likelihood of larger scale shootings is still possible.