Pima County Sheriff's Department(TUCSON, Ariz.) -- Jared Lee Loughner, the man accused of carrying out the Jan. 8, 2011 shooting rampage in Tucson, Ariz., that left six people dead and 13 people injured, pleaded guilty to the charges against him in federal court on Tuesday.
In March 2011, Loughner pleaded not guilty to 49 counts, including six first-degree murder charges, which carried a possible death sentence upon conviction.
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