Detectives today released a new image of Shane O'Brien - wanted in connection with the “unprovoked murder” of Josh Hanson in Eastcote.
His image has been circulated worldwide.
Police revealed today that in February this year he was arrested in Prague for criminal damage and assault. Officials said that he used the Italian alias of Enzo Mellonceli, “supported by false documentation”, and was bailed pending further enquiries.
An image taken then shows he has “grown his hair and has a full beard and a distinctive new tattoo of an owl holding a skull, which covers up his previous “Shannon 15-04-06” tattoo”, police reported.
A previous £20,000 reward has been upped to £50,000 and is on offer for information leading to Mr O'Brien's arrest and prosecution on the second anniversary of the murder.
Mr Hanson, 21, from Kingsbury, pictured below, died on 11 October 2015 after suffering a serious wound to his neck, in the early hours near a bar in Field End Road.
His mum Tracy Hanson has previously described how “every day is a living nightmare and no one deserves to go through this”.
Her justice for Josh Hanson Facebook page has attracted tens of thousands of followers.
Nick Downing, Hillingdon's Detective Chief Superintendent at the time of the murder, described it as a “tragic and senseless death”.
Detective Chief Inspector Noel McHugh, of the Homicide and Major Crime Command, said: “Today marks the second anniversary of Josh's brutal and senseless murder and my team, supported by the National Crime Agency, have been working tirelessly to track O'Brien's movements.
"It is clear he is being helped by others to evade police and has the ability to move around without using his own identity. That is why we decided to offer such a large reward - £50,000 is a substantial amount of money and I hope it will encourage someone who moves in O'Brien's circles to come forward. If you have been debating whether to make that call, just listen to the pain in the voices of Josh’s mum Tracey and his sister Brooke. Your silence is denying justice to Josh’s family.
“When arrested in Prague, O’Brien had boxing gloves with him. He uses gyms and will continue to do so I’m sure. His new tattoo is so distinctive it should stick in the mind of fellow boxers, or possibly a new partner. I would like to hear from the tattoo artist who covered up his original ‘Shannon 15-04-06’ tattoo, it would have taken several sittings.
"I have the greatest respect for Josh's family who have acted with such dignity and patience during what can only be described as a living nightmare.”
He said: “Tracey and Brooke have been inspirational in leading personal campaigns against knife crime; but of course they are desperate to see the person responsible for Josh's murder brought to justice. When pondering on whether to make that call, imagine the relief your information could give to Josh’s family."
After the murder, Mr O’Brien was flown out of the UK in a privately chartered plane from Biggin Hill Airport, according to The Metropolitan Police Service.
In March 2015 he was added to the Most Wanted list by the National Crime Agency and Crimestoppers. At that time it was believed he could be hiding in the Netherlands. Information later indicated he had travelled to Dubai. He was last seen when arrested in Prague. He had been using the Italian aliases of Enzo Mellonceli and Enzo Machado.
Mr O'Brien, originally from Ladbroke Grove, is described as white and 6ft with grey eyes and dark brown hair. Police previously reported he had links to the Ruislip area. The original picture released of him is shown below.
Police said he should not be approached by members of the public - any sightings of him should be reported to police immediately on 999.
Two men have so far been arrested as part of the investigation into Josh's murder.