I'm sorry, have the authorities stated where the gun came from?
CBS News correspondent Bob Orr reported that "Lane has told investigators he stole the gun he used from his uncle, who had legally obtained it. Sources say in fact there were lots of legal guns around. About two dozen weapons were discovered in FBI searches of Lane's relatives' homes." http://www.cbsnews.com/8301-201_162-57386938/suspect-in-ohio-school-shooting-arrives-at-court/
Stole it, oh well making them illegal would have stopped that theft....so much for the gun control you want eameece..