Claude Faivre was Chief Superintendent of the Paris Police Prefecture during the 1910s. In 1912, he assigned the famed "Tiger Brigades" to tackle rampant crime in Paris. He instructed his men to not use tips (which he said were for gamblers) or intuition (which he said was for animals), but to use logic, anthropometry, fingerprinting, car mechanics, automatic guns, good shoes, and a perfect ethical code; he also told his men that there were to be no "closed cases", only "solved cases".