Detroit Police and RCMP: 1951.  On July 24, 1951, the city of Detroit celebrated its 250th anniversary. To honor the occasion, a number of special events were held. This photo, shot by  Howard McGraw of the Detroit News, depicts the Detroit police on horseback with the RCMP. (Shorpy) Detroit News, Vintage Photographs, Vintage Photos, Giant Animals, Kansas City Missouri, Police Uniforms, Canadian History