Established in 1654, the Calvert County Sheriff s Office protects and serves the residents of Prince Frederick, Md. It offers traffic incident management and crime mapping services. The Calvert County Sheriff s Office operates general assignments, narcotics, evidence, warrant, and polygraph and voice stress analysis divisions. Additionally, it operates canine, special operations, bike patrol, honor guard and public information units. It operates a neighborhood watch program that provides protection against crime and illegal activities and curtails drug dealings and involvements.