A file photo of a Glock 19, the type of weapon that authorities say was used in the Jan. 8 shootings in Tucson. Chip Somodevilla/AP hide caption

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Arizona state Sen. Russell Pearce speaks in April during a vote on SB 1070, the immigration bill he sponsored. The final version resembled "model legislation" he helped draft during an ALEC conference in Washington, D.C., last year. Ross D. Franklin/AP hide caption

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Arizona state Sen. Russell Pearce, pictured here at Tea Party rally on Oct. 22, was instrumental in drafting the state's immigration law. He also sits on a American Legislative Exchange Council (ALEC) task force, a group that helped shape the law. Joshua Lott/Getty Images hide caption

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The crowded yard at Folsom State Prison Laura Sullivan/NPR hide caption

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