Jack the Ripper Case: This friendship stayed intact when Melville returned to England and was originally offered the post of Assistant Chief Constable of the Criminal Investigation Department by James. However, probably due to the bad tension between James Monro and Sir Charles Warren, the Commissioner of the Police, Sir Charles stopped this from happening.
Sir Charles resigned from the force in November 1888 and by June 1889, Melville was offered the position he was meant to have got the year before. In 1890, he was promoted to Chief Constable, following the sudden passing of Adolphus Williamson.
Melville wrote his Memorandum in 1894; this was his own report of the crimes of Jack the Ripper. In it, he explained his own views about the suspects he thought more likely to be the perpetrator of the crimes than the suggestion of Thomas Cutbush. Melville named Montague John Druitt, who had committed suicide in November 1888, Kosminski and Michael Ostrog.
In 1900, Melville was involved in a committee that was discussing the method of using the measurement of fingerprints to catch a criminal. This helped in a later case he was involved in - the conviction of the Stratton Brothers, Albert and Alfred. This was the first ever case solved by using fingerprints.
In 1903, he was appointed Assistant Commissioner and became involved in many cases, such as the case of Hawley Harvey Crippen, a doctor who was hanged for the murder of his wife on 23rd November 1910.
Melville was knighted in 1907 and five years later he was appointed Companion of the Order of the Bath. In 1913, he was awarded the King’s Police Medal, made a Knight Commander of the White Military Order of Spain and Commander of the Order of the Dannebrog.
Sir Melville was starting to feel unwell in 1911, however, his health did not get better and in 1913, his health forced him to retire. A year later, he wrote his memoirs, Days of My Years. Melville passed away on the 12th May 1921.