Md. Code, Courts and Judicial Proceedings § 5–613

Unless a subdivision or municipality requests the appointment of an individual as a special policeman and the request is granted as provided in Title 3, Subtitle 3 of the Public Safety Article, the State and any subdivision or municipality of the State may not be liable or accountable in any way for any act or omission by an individual appointed as a special policeman under Title 3, Subtitle 3 of the Public Safety Article.