Frederick Wensley

Frederick Porter Wensley (28 March 1865 – 4 December 1949) served as a British police officer from 1888 until 1929, reaching the rank of chief constable of the Scotland Yard Criminal Investigation Department (CID). Serving in Whitechapel for part of his career, he was involved in street patrols during the investigation of the Jack the Ripper murders, details of which he would later publish in his memoirs in 1931. He was one of the 'Big Four', a nickname given to the four Superintendents in charge of the Metropolitan Police CID, with his murder investigations regularly published in the press. The leading prosecuting barrister Sir Richard Muir referred to him as "the greatest detective of all time". Provided by Wikipedia