The Metropolitan Police is offering a reward of up to £10,000 for information leading to the arrest of Charles (Charlie) Riddington who is wanted in connection with the murder of George Barker in Bexley, Dartford.
George Barker, 24, from South Darenth, Kent was fatally stabbed at a gym in Stable Lane, DA5 on Monday, 14 November 2016.
Charles Riddington is also known to use the alias 'Barry Ryan'.
An investigation is underway by detectives from the Homicide and Major Crime Command, led by Detective Chief Inspector Laurence Smith.
Officers know that Riddington left the UK from Manchester Airport for Dusseldorf travelling under his alias, but he may have returned to the UK.
Anyone who has information concerning the murder, or Charles Riddington's whereabouts, should call the incident room on 020 8345 3985 - you can also tweet information to @MetCC.
Alternatively, call Crimestoppers anonymously on 0800 555 111.