Photos: America's Toughest Sheriff at Work

Maricopa County Sheriff's Office aggressively arrests illegal immigrants.

Taking on Illegal Immigration

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"These are convicted people," Sheriff Arpaio said as he gave "Nightline" a tour of the facility. "Why do you say rehabilitation? Why don't we use the word punishment anymore? I'll use it. You do something wrong, you lose your privileges, and you're punished for it. So I'm not afraid to say punishment." (Jeffrey Kofman/ABC News)
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