Sheriff Joe Arpaio Sheriff Joe Arpaio

Former Maricopa County, Ariz., Sheriff Joe Arpaio, seen in 2010, was pardoned by President Trump on Friday. Sandy Huffaker/Getty Images hide caption

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Sandy Huffaker/Getty Images

After Arpaio, 4 Answers To Questions About How Pardons Are Supposed To Work

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President Trump and first lady Melania Trump walk across the tarmac before boarding Air Force One at Morristown Municipal Airport Sunday to return to Washington. Pablo Martinez Monsivais/AP hide caption

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Pablo Martinez Monsivais/AP

Sheriff Joe Arpaio, seen here at a rally for Republican presidential candidate Donald Trump earlier this month, is now facing criminal charges from federal prosecutors over his immigration patrols. Robyn Beck/AFP/Getty Images hide caption

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Robyn Beck/AFP/Getty Images

Maricopa County Sheriff Joe Arpaio speaks at a 2013 news conference in Phoenix. Arpaio faces contempt-of-court charges in a racial-profiling case. A federal judge found that Arpaio and his deputies continued conducting immigration patrols after a court ordered them to stop. Ross D. Franklin/AP hide caption

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Ross D. Franklin/AP