Summary: Jared Loughner, 22, opened fire outside a Safeway during a constituent meeting with Congresswoman Gabrielle Giffords (D-Ariz.) before he was subdued by bystanders and arrested.
Weapon: One semiautomatic handgun
Age of Shooter: 22
Mental Health Details: Yes
Sources: http://www.time.com/time/magazine/article/0,9171,2042358,00.html; http://www.csmonitor.com/USA/Politics/2011/0110/Why-Jared-Loughner-was-allowed-to-buy-a-gun; http://www.nytimes.com/2011/01/09/us/politics/09giffords.html?ref=jaredleeloughner
mental Health Sources: http://www.time.com/time/magazine/article/0,9171,2042358,00.html