This report is from the New York Times regarding the school shooter in Oregon. It is about the source of his weapons as confirmed by the Bureau of Alcohol, Tobacco, Firearms, and Explosives.
In all, the gunman had owned 14 firearms, said Celinez Nunez, an agent of the Bureau of Alcohol, Tobacco, Firearms and Explosives, including one he had traded in. The Douglas County Sheriff’s Department said the gunman took five handguns and a rifle to Umpqua Community College on Thursday morning, and had two pistols, four rifles and a shotgun in his apartment.As AWR Hawkins of Breitbart said at the recent Gun Rights Policy Conference, "It is harder to find a mass shooter who didn't go through a background check than one that did."
“All 14 have been traced to a federal firearms dealer,” some bought by the gunman and others by members of his family, said Ms. Nunez, the assistant special agent in charge of the Seattle field office. “They were all purchased legally.”
To illustrate that point, Hawkins listed a number of these murderers that did pass background checks in a column today in Breitbart.