How The Federal Case Against Joe Arpaio Unraveled

09/02/2012 09:56 pm ET

At 5 p.m. Friday, before a long holiday weekend, a brief note went out from the U.S. Attorney's Office in Phoenix, saying without explanation that the office would not file federal or state criminal charges against "current and former members of the Maricopa County Sheriff's Office and the Maricopa County Attorney's Office."

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