He was related to Sir William Henry Sleeman, an administrator in India in the first half of the 19th century who was responsible for suppressing the Thuggee sect.
[2] He was ultimately promoted to lieutenant colonel and was appointed assistant judge advocate general in the headquarters of the Allied Land Forces in South East Asia.
Lieutenant Kaniyuki Nakamura was sentenced to death for the illegal execution by beheading of an Indian serviceman accused of planning to escape.
In the "Double Tenth" trial, 21 members of the Kempeitai (Japanese military police) were accused of war crimes relating to the torture of 57 of prisoners (including John Leonard Wilson, Bishop of Singapore) following a raid on Changi Prison on 10 October 1943 to investigate a suspected spy network, thought to be responsible for the sinking of seven Japanese merchant vessels in Singapore harbour in September 1943.
He was junior counsel for the defence in the trial of John Christie, accused of murdering his wife Ethel at 10 Rillington Place.