Nidal Hasan Ft Hood Shooter: Registered Democrat and Muslim.
Aaron Alexis, Navy Yard shooter black liberal/Obama voter
Seung-Hui Cho Virginia Tech shooter: Wrote hate mail to President Bush and to his staff, registered Democrat.
James Holmes the Dark Knight/Colorado shooter: Registered Democrat, staff worker on the Obama campaign, #Occupy guy,progressive liberal, hated Christians.
Amy Bishop, the rabid leftist, killed her colleagues in Alabama, Obama supporter.
Andrew J. Stack, flew plane into IRS building in Texas Leftist Democrat
Good list. Need to add the one who attacked at the softball field.
Maybe ban LIBs or DIMs from having guns...or any sharp object.