Detectives investigating the murder of 16-year-old Hani Hicham Abou El Kheir are continuing their efforts to seek justice for his family.
Hani died in January 2013 after being attacked with meat cleavers and knives while walking through a Pimlico estate.
Five men were convicted of his murder and sentenced to a total of 131 years in prison following a trial at the Old Bailey in January 2014.
However one suspect, 33-year-old Dilawar Hussain, who was born in Paddington, is still at large, Met Police say.
Hussain’s home in Rampayne Street, in Pimlico, was searched four days after the murder, but he was not present.
An arrest warrant was obtained on March 21, 2013 at Barkingside Magistrates’ Court and officers established that Hussain, who was 21 years old at the time, had travelled to Bangladesh.
Now, Met detectives and Hani’s mother, Pauline Hickey, are appealing for information in relation to Dilawar Hussain’s whereabouts.
A warrant remains in place for his arrest.

Hani’s mother Pauline said: “It is now 12 years since my only son, Hani, was hunted down and attacked in a busy street by a group of feral men.
“While several people have been jailed for his murder, one suspect remains free.
“Hani was only a boy when he was killed – he had his whole life to live and this was brutally taken away.

“The pain of his loss does not diminish with the passing of time and it only feels greater knowing Dilawar Hussain has evaded justice so far.
“If you can help, I would plead with you to get in contact with the police.”
Detective Chief Inspector Mark Rogers said: “I am appealing for information as to the whereabouts of Dilawar Hussain. In 2014 we released a statement confirming he had fled to Bangladesh soon after the murder and we’ve heard nothing to believe that this situation has changed.

“Hani’s mother Pauline continues to fight for justice and to ensure those responsible for her son’s murder are held to account and we will not rest until we’ve helped achieve this for her.”
Anyone with information regarding the wherabouts of Dilawar Hussain has been asked to share this information with the Met Police via 101 or through our website and quote Op Jabalpur, or to notify their local law enforcement agency.