ARLINGTON, Va. (June 13, 2018) -- Robert D. MacLean, chief of police for the United States Park Police paid his respects to America's fallen heroes while participating in an Army Full Honors Wreath Laying ceremony escorted by Maj. Gen. Michael L. Howard, commanding general, Joint Force Headquarters - National Capital Region and U.S. Army Military District of Washington, at the Tomb of the Unknown Soldier, Arlington National Cemetery, Virginia.Prior to the ceremony, MacLean viewed the changing of the guard and met with Lt. Col Jeffery Burroughs, commander, 4th Battalion, 3rd U.S. Infantry Regiment (The Old Guard).Park Police was created by former President George Washington in 1791. The force functions as a unit of the National Park Service with jurisdiction in all Federal parks.Officers also carry out services for many notable events conducted in the national parks located in the National Capital Region, New York City and San Francisco metropolitan areas.Following the ceremony MacLean received a tour of the Memorial Amphitheater Display Room and was presented a token of gratitude from Karen Durham-Aguilera, executive director, Army National Military Cemeteries.