Joe Arpaio, sheriff of Maricopa County in Arizona, got a much-appreciated birthday note this month from NBA franchise the Boston Celtics.

On Monday he tweeted:


The letter, dated on his June 14 birthday, thanks Arpaio for his support even from across the country in Phoenix.

Arpaio is considered by himself and some others as "America's toughest sheriff." He's garnered national attention for his controversial immigration enforcement style, which includes tactics that have led the Justice Department to file a lawsuit against him over alleged civil rights abuses. Arpaio recently drew fire when officers from the Maricopa County Sheriff's Office took a 6-year-old undocumented immigrant into custody before releasing her into the care of a faith-based social-services organization.

Beyond immigration issues, Arpaio has also agitated his critics with his persistent probe into the authenticity of President Barack Obama's long-form birth certificate. He's maintained that he and his "Cold Case Posse" have uncovered evidence that the document, released by the White House last year, is a forgery.

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