Theresa O'Rourke's best friend Jitka Vesel was murdered in Chicago on April 13, 2011, by a man who stalked her after she rebuffed his advances. Prohibited from purchasing a gun in the U.S. because he was a Canadian citizen, the shooter bought a gun from a private seller on Armslist.com who was not required to conduct a background check. -- Demand Action http://www.demandaction.org