Big Four

The Big Five was a nickname given to five superintendents in charge of the Criminal Investigation Department at Scotland Yard, the headquarters of the Metropolitan Police, from about 1906 onwards. The first five to be appointed were: Charles John Arrow, Paul Crane, Walter Dew, Frederick Fox and Frank Frost. These men and their successors, with their subordinate inspectors, regularly worked on high-profile murder cases through the British Isles. By the 1970s, the term was dropping from currency.