Donald Sutherland Swanson was born in the far north of Scotland, leaving for London in 1867. The following year he joined the Metropolitan Police and began patrolling the streets of the capital as a uniformed constable. When he retired 35 years later, in 1903, he had risen to the rank of Superintendent of the CID at Scotland Yard, the top detective in the country. On 15th September 1888 Swanson was hand-picked by Commissioner Sir Charles Warren...