The 16-year-old boy was arrested in the early hours of Friday, 8 December on suspicion of murder and remains in custody.
Detective Chief Inspector Jo Yorke, from the Met’s Specialist Crime Command, leads the investigation, she said: “While this arrest marks a significant development in this investigation, I would like to reiterate my appeal for anyone with information to come forward.
“I have a team of dedicated and experienced officers working tirelessly to ensure Lianne’s family and friends get the answers they so desperately need; if you can help then please get in touch.”
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Anyone with information can call the incident room on 020 8345 3865, use 101 or message via ‘X’ @MetCC. Alternatively you can contact the independent charity Crimestoppers if you do not want to give your name, either online or by calling 0800 555 111.
Detective Chief Superintendent James Conway, responsible for policing in Hackney and Tower Hamlets, said: “This arrest demonstrates the progress the investigation is making and I hope it gives the local community confidence in the commitment we made on Wednesday to finding those responsible for Lianne’s murder and holding them to account.
