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Photo by: Mamta Popat

This March 2010 photo shows a man identified as Jared Loughner at the 2010 Tucson Festival of Books in Tucson, Ariz. The Arizona Daily Star, a festival sponsor, confirmed from their records that the subject's address matches one under investigation by police after a shooting in Tucson that left Rep. Gabrielle Giffords wounded and six others dead. Police say a suspect is in custody, and he was identified by people familiar with the investigation as Mr. Loughner, 22, of Tucson. (AP Photo/Arizona Daily Star, Mamta Popat)

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