Jacqueline Mary Thomas was a 15-year-old biscuit factory worker from the Alum Rock area of Birmingham, England. On Friday, 18 August 1961, she attended a funfair with friends at nearby Ward End and failed to return home afterwards. She was last seen alive at around 10:30 pm talking with a young man. Her family reported her missing that night. A week later, on 25 August 1961, a dog walker discovered her body hidden in undergrowth at disused allotments near her home on Everton Road. She had been sexually assaulted and strangled.
The murder investigation involved several hundred police officers who visited more than 1,000 homes in the area and interviewed local residents, Thomas's colleagues, and workers from the fair. Police launched a poster appeal and sought information from the public during a football match at St Andrew's Stadium. Witnesses recalled Thomas speaking with a young man at the fair, later identified as 24-year-old Anthony Hall, a married father of one. Hall admitted being at the fairground with Thomas and that they had kissed, but denied killing her. He asked his mother to provide a false alibi because he did not want his wife to learn of his behavior with other girls. Despite being considered a suspect, Hall was not charged at the time. At the inquest on 7 December 1961, the coroner told the jury that a murder verdict naming Hall would be an extremely grave step requiring complete certainty.
In March 1969, Hall was convicted of the murder of 16-year-old Sylvia Whitehouse, whom he stabbed to death with a screwdriver after offering her a lift, in a case that became known as the "Lovers' Lane Murder." He was sentenced to life imprisonment and remained in custody until his death.
In early 2007, West Midlands Police's Major Crime Review Team revisited the Thomas case as part of a routine re-examination of unsolved cases, aided by advances in DNA technology. Documents were studied by detectives and reviewed by Crown Prosecution Service lawyers. In November 2007, a decision was made to charge Hall with Thomas's murder, and he appeared at Birmingham Magistrates' Court on 29 November 2007, again denying involvement. He was remanded in custody.
At a hearing at Birmingham Crown Court on 19 August 2008, Judge Frank Chapman ruled that Hall should not stand trial because the events had occurred "too long ago" and a fair trial was not possible. The judge noted that 21 witnesses had died since 1961, others could not be traced or were too ill to testify, and police had not preserved evidence and records from the original investigation. He stayed proceedings against Hall. A member of the Major Crime Review Team stated afterward that they were not looking for anyone else in connection with the case.
Anthony Hall died in custody at a hospice on 6 December 2011, following a long-term illness, while still serving his sentence for the Whitehouse murder. The case of Jacqueline Thomas's death remains formally unresolved due to the stayed proceedings.