Nathan Smith, aged 27 and of no fixed address, is being sought by officers following the death of Takieddine Boudhane – known as Taki – in Finsbury Park on Friday, 3 January.
The Met is now offering a substantial reward of up to £10,000 for information leading to the identification, arrest and prosecution of the person responsible for Taki’s death.
Detective Chief Inspector Neil John, who is leading the investigation, said: “We are very keen to speak to Nathan Smith as part of our ongoing enquiries.
“We know that he fled the country the day after Taki’s murder, initially travelling to Austria and then onto Switzerland. We are confident he has now moved elsewhere in Europe or potentially further afield.
“There is a European Arrest Warrant out for Nathan and our enquiries continue in several countries, with assistance from the NCA.
“On behalf of Taki’s grieving family, I am making a direct plea to Nathan to get in touch with us.
“Similarly, we believe there are people out there who know where he is or who may have seen him over the last six months. Please contact us and assist with our investigation. Any information you have – no matter how small – could be what we are looking for. If you don’t want to speak to police, call Crimestoppers anonymously on 0800 555 111.”
Nathan is described as a white male, 6ft 3ins and of slim build, with dark hair. He usually has a dark beard although this may have been shaved off. He also has a tattoo on his right forearm reading ‘count your blessings’.
He has links to north London, particularly Islington, Camden and Kentish Town.
Taki, a 30-year-old Algerian national living in Enfield, was working as a delivery driver on his motorbike when he was involved in a traffic altercation on Lennox Road, near Charteris Road, N4 at around 6.50pm on Friday, 3 January.
The incident escalated and culminated in Taki being stabbed. Despite the efforts of emergency services, he was pronounced dead at the scene shortly afterwards.
A post-mortem examination found the cause of death to be an incised wound to the chest.
Taki’s mum Saida Boudhane said: “Whoever did this horrible crime didn’t kill just my son Taki, but they killed our entire family.
“My son is still alive until we bring to justice the person who murdered my beloved son. All I want now is justice for Taki.”
DCI John added: “Taki was an innocent man who had come to this country for a better life. That life was suddenly cut short, leaving behind a distraught family both here in the UK and back in Algeria.
“The least his family deserves is justice. We are doing all we can but now we need your help and we are asking everyone to share this appeal to ensure as many people as possible see it.”
Anyone with information about the whereabouts of Nathan Smith or the incident itself should call the incident room on 0208 358 0100. Information can also be provided online via https://mipp.police.uk/operation/01MPS20Q52-PO1