CRIMESTOPPERS has raised the reward to find the third man in connection with a murder investigation.
Robert Powell, 50, was shot outside an address in Roydon in the early hours of June 13, 2020.
He died from his injuries the following day.
Police say two of the three men they wanted to speak to are now in custody.
Temitope Adeyinka, also known as Limo, is still outstanding, and a European Arrest Warrant is in place to facilitate his capture.
The charity Crimestoppers has increased their reward to up to £10,000 for any information that leads to his arrest.
Senior Investigating Officer Detective Superintendent Stephen Jennings said: "Robert’s death was shocking, violent and heartless.
"There’s a loving family who has spent more than two-and-a-half years in a state of limbo, and grief deserves answers.
"Thirty-eight-year-old Temitope Adeyinka, also known as Limo, is around 5ft 8ins tall and of a medium build.
"He has links to areas in East London, but we believe he may have travelled abroad.
"We want anyone who may know of Limo’s current whereabouts to come forward as soon as you can.
"I’m also making this direct appeal to you Limo – it’s only a matter of time before we find you.
"The best thing you can do is hand yourself in and tell your side of the story before it’s told for you.
"Help us get answers for Robert’s family and call Crimestoppers on 0800 555 111 or make a report on their website. You will remain anonymous."
If you’re yet to speak with the Police about something you may have seen or heard in relation to this case, get in contact by calling 101 and quoting incident 42/84970/20.
Israar Shah, 38 is due to appear at Chelmsford Crown Court on Monday, June 12.
Nana Oppong, 42, was previously detained by Moroccan authorities and formally arrested under a Red Notice and Provisional Arrest Request.
He remains in Moroccan custody while extradition proceedings continue.
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