Who is Inspector Ian Rutledge from A Test of Wills and what is their importance?

Ian Rutledge is the main character in A Test of Wills. He is an Inspector/Detective at Scotland Yard, the police headquarters in London, England. His supervisor, Superintendent Bowles, assigns him to Charles Harris's murder case in the hope that he will fail. Prior to World War I, Rutledge was a top-notch investigator with a reputation for solving difficult cases. In 1914, he went off to war, but he has returned to Scotland Yard in 1919 a much-changed man.