Jared Loughner, the alleged shooter in Tucson's massacre this weekend, had multiple run-ins at his local community college before he was asked to leave. Colleges and universities have revamped their procedures since the Virginia Tech shooting in 2007. But those changes did not stop Loughner from buying a gun. In fact, Arizona has a relatively flexible law for forcing the mentally ill to seek treatment. But there's no evidence anyone sought to have Loughner evaluated, despite his bizarre behavior in class.