Jared Loughner agrees to plead guilty in Tucson shootings

(Photo: Martial Trezzini / EPA)

Updated 3:50 p.m. ET: Jared Lee Loughner on Tuesday agreed to plead guilty to killing six people and wounding former Congresswoman Gabrielle Giffords and a dozen others in a January 2011 mass shooting.

U.S. District Court Judge Larry A. Burns ruled that Loughner, a 23-year-old college dropout, was competent enough to enter a plea. 

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