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KEY WEST (CBSMiami/AP) – A Florida Keys is suing the Monroe County Sheriff’s Office after he was detained on behalf of federal agents who wanted him deported to Jamaica, even though he is a U.S. citizen.

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Peter Brown filed the federal lawsuit on Monday, accusing the Keys agency of violating his constitutional rights.

Brown wasn’t deported after a friend provided the federal Immigration and Customs Enforcement agency with proof of his citizenship.

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Brown, who resides in the Keys, says he was arrested last April by deputies at the request of ICE agents.

He says he repeatedly told deputies he was a U.S. citizen and offered to produce a birth certificate showing he was born in Philadelphia.

A spokesman for the sheriff’s office didn’t immediately respond to a request for comment.

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(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)