Pic: Metropolitan Police] CCTV showed him approach the 41-year-old chef and headbutt him outside the Dr Power restaurant in Queensway, near west London's Notting Hill Carnival on 26 August last year, the court heard.
Around a minute later, Wilson punched Mr Imnetu five times in the head, continued to repeatedly punch him while he was on his hands and knees, and then kicked him in the head.
Detective Chief Inspector Brian Howie said Mr Imnetu "was in London for a few days to help train his colleagues and went out that evening to enjoy the post-Notting Hill Carnival atmosphere, where tragically he was violently assaulted".
Speaking in court, Wilson said he felt "trapped" and "scared" at the time because he believed Mr Imnetu was holding a broken bottle - which turned out not to be the case.
Pic: Metropolitan Police] Mr Imnetu, who worked under star chefs Gordon Ramsay and Marcus Wareing, was said to have been "heavily intoxicated" at the time and died from his injuries four days later in hospital.
