Police investigating a historic sex abuse ring in Westminster are attempting to uncover whether a man was murdered in the Nineties because he planned to expose child abuse at a London council. An unpublished internal investigation into abuse by staff within Lambeth council ... reveals claims that a civil servant was planning to expose how council property was used to carry out sexual assaults. Bulic Forsythe was beaten to death at his flat in 1993 after he reportedly told a colleague that he knew about a sex ring operating at children's homes. Police appealed for help in tracking down three smartly dressed men who left the flat the day after the murder, but the case remains unsolved. It was feared he was killed as a possible outcome for anyone who asked too many questions." Other shocking allegations detailed in the document include senior Lambeth civil servants using council premises to carry out rapes, with one female staff member claiming she was raped alongside children and animals by senior council staff. Although the report recommends a criminal investigation, its findings were not formally investigated by police at the time. The revelations come after Labour MP John Mann last year called on police to investigate the suspicious deaths of Forsythe and an unnamed whistleblower who was said to have obtained videos of child sex "parties". The inquiry was announced last summer in the wake of a series of child-abuse scandals and claims a paedophile ring operated at Westminster in the 1980s.