Detectives have searched several addresses looking for the killer of a 16-year-old who bled to death in his brother’s arms at the weekend after suffering an horrific neck injury.

Officers know who they want to question in connection with the murder of Jimmy Mizen, who died after being attacked in a bakery in Lee, southeast London on Saturday morning.

Jimmy’s mother, Margaret, 55, said that is was probable that her family knew the killer. The well-liked teenager had celebrated his birthday the day before the killing and should have been at work with his father, Barry, at his shoe repair shop, but had been given him the day off as a treat.

Jimmy, was with his brother Harry, 18, when he was killed. He was hit in the neck with a shard of glass after an unprovoked argument with another youth at the Three Cooks bakery.

The youth, who police described as “intent on violence” asked Jimmy outside for a fight but he refused. The aggressor then smashed in the glass door of the bakery, picked up an advertising board and started waving it around. A fight started and Jimmy’s throat was cut with glass.

Another brother, Tommy, was called to the Three Cooks bakery and cradled his brother as he died.

Jimmy, a 6ft 4in member of Sidcup Rugby Club, had been out with his brother to buy his first lottery ticket when he was attacked.

It is not clear how the argument started but reports suggest that Jimmy was trying to placate another youngster who had been asked to leave the shop.

Detective Chief Inspector Cliff Lyons, the senior investigation officer, said: “This is another tragic incident where a young victim has lost his life, and our sympathies are with his family and friends.

"There was an argument between Jimmy and the suspect, following which Jimmy was assaulted and he sustained serious neck injuries.

"The suspect, described as a male youth, made off from the scene up Burnt Ash Hill towards Burnt Ash Lane. I would urge anyone who was in and around the Burnt Ash Hill area at the time of the incident to call us at our incident room with any information they may have."

Police were today carrying out a fingertip search of the sealed-off area outside the bakery and were also conducting house-to-house inquiries.

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