Calvert County Sheriff's Office
The CCSO was founded in 1654.
In 2004, the Special Operations Division became only the second local law enforcement agency to be trained by the elite Navy Seals in Special Waterborne Operations. Given the presence of two major facilities along the shores of the Chesapeake Bay (Calvert Cliffs Nuclear Power Plant and the Cove Point liquified natural gas facility) the sheriff's office has a unique need for maritime law enforcement skills. In 2008, the Special Operations team took part in the seizing of a cargo ship in the Chesapeake Bay that was involved in a bizarre incident of drunk sailors violating several Coast Guard regulations.
The current Sheriff is Mike Evans, a 27-year veteran of law enforcement.
The Sheriff's office has several divisions:
Administrative & Judicial Services -Consists of the Civil Process Unit, Courthouse Security Unit, Accreditation, and the Southern Maryland Criminal Justice Academy.
Criminal Investigations -Consists of the Calvert Investigative Team, Warrant Unit, Crime Scene Unit, and the Evidence/Property Unit.
Patrol -Consists of the K-9 Unit, Community Action Team, and Twin Beaches Patrol.
Special Operations & Homeland Security -Consists of the Special Operations Team and the Homeland Security function.
Detention Center -The Detention Center is responsible for detaining pre-trial suspected offenders to adequately assure their appearance at trial or other judicial proceedings and to hold those offenders serving short-term sentences until legally released 
All CCSO deputies' authority is constitutional in origin and are sworn law enforcement officers with full arrest authority as governed under the Maryland Police and Correctional Training Commission.