(NBC News) The federal government has closed a criminal probe into Arizona lawman Joe Arpaio, who styles himself as “America’s toughest sheriff,” and no charges will be filed, the U.S. Attorney’s Office said on Friday.

The Maricopa County sheriff and his deputies have been under investigation by the U.S. Justice Department since 2008.

Last December, the department said he and his office violated U.S. civil rights laws by engaging in racial profiling of Latinos and making unlawful arrests in their bid to crack down on illegal immigrants.

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