 In 1949, Humphreys presided over the trial of John George Haigh, the Acid Bath Murderer, whom he sentenced to death.In 1950, he sat with the Lord Chief Justice Lord Goddard and Mr Justice Sellers in the Court of Criminal Appeal to hear the appeal of Timothy Evans against his conviction for the murder of his baby daughter, evidence having also been admitted as to the death of Evans' wife.He was appointed a Knight Bachelor in 1925 and a Privy Counsellor in 1946.