MILWAUKEE (CBS 58) -- New documents show the FBI was looking into emails and texts of Former Milwaukee County Sheriff David Clarke after he had a man questioned at the airport.

Nearly a year ago, Dan Black was detained at Mitchell International by Milwaukee County Deputies after making a comment to the then-sheriff on a plane while it was still in Dallas.

In May, the US Attorney said it would not file charges against Clarke.

Black filed a Civil Rights Lawsuit. That lawsuit is still ongoing.

Stay with CBS 58 News for more information on this developing story.

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