herself, fearing the worst, walked into the old building. There she discovered her own sister's extensively battered body lying face down, with her shoes and stockings lying beside her. A postmortem concluded that MacDonald had been raped and extensively beaten, particularly about the face, before she had been strangled to death with one of her own stockings. Her murder had occurred approximately 30 hours before her body had been discovered. Unlike Docker, the body of MacDonald was fully clothed, although her underclothing had been torn, and, like Docker, she had been menstruating at the time of her death. Police inquiries into MacDonald's movements on the night of her murder produced several eyewitnesses who were able to accurately describe the man with whom she had been in the company of at the Barrowland. Door-to-door inquiries on MacKeith Street also produced a woman who remembered hearing female screams on the evening of MacDonald's murder, although this individual could not recall the precise time. Consequently, police considered this information of little use to their inquiry. Initial investigation Although the City of Glasgow Police noted several striking similarities between the murders of Docker and MacDonald, including that both women had attended the Barrowland Ballroom on the evening of their murder, been beaten before being strangled to death with a ligature, were menstruating, and had their handbags taken from the crime scene, initially both murders were not considered to be the work of the same perpetrator. Despite extensive public appeals, the investigation into the murder of Docker had quickly become a cold case. Police had little information, owing to both a lack of witnesses and hard evidence. The investigation had also been severely hindered by investigators not discovering until three days after her death that Docker had attended the Barrowland on the evening of her murder. Eighteen months later, following the discovery of MacDonald, police became aware of remarkable similarities to the murder of Docker. Although police did not conclusively link both murders to the same perpetrator, they could not completely discount this theory. In addition, police were certain the perpetrator(s) held a high degree of local geographical knowledge. However, they may have been a stranger to the district, as none of the eyewitnesses with whom investigators conversed directly knew the man or men seen in the company of either woman prior to her murder. For the first time in a Scottish murder hunt, a