The Massachusetts Prisons Department is facing a lawsuit from a number of civil liberties groups.
The American Civil Liberties Union and Prisoners Legal Services filed the suit in an effort to stop the agency from using drug-sniffing dogs to search prison visitors.
The Department of Correction implemented the policy in November to prevent drugs from getting inside prisons.
The plaintiffs said the searches are an invasion of privacy and dogs can mistake legal scents for drugs.
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