Basil Thomson
Sir Basil Home Thomson, was a British colonial administrator and prison governor, who was head of Metropolitan Police CID during World War I. This gave him a key role in arresting wartime spies, and he was closely involved in the prosecution of Mata Hari, Sir Roger Casement and many Irish and Indian nationalists. His equating of Jews with Bolshevism led to accusations of anti-semitism. Thomson was also a successful novelist.
Biography from
Wikipedia, CC BY-SA 4.0. Portrait: via Wikipedia (see source).