Francis Carlin
The Big Four was a nickname given to the four Superintendents in charge of the Criminal Investigation Department at Scotland Yard, the headquarters of the Metropolitan Police, from about 1919 onwards.
They were:
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Wikipedia
The Big Four was a nickname given to the four Superintendents in charge of the Criminal Investigation Department at Scotland Yard, the headquarters of the Metropolitan Police, from about 1919 onwards.
They were: