At 11:22 PM on Friday evening, PC Beresford and PC Dalton arrived at 18 Rose Hill Gardens to investigate reports of a disturbance. Neighbours had heard a commotion and the sound of a woman screaming. The house appeared quiet on approach, with a single light on in the first floor window. After ringing the doorbell several times, the door was finally answered by Shirley Cobham, a petite woman in her early 50s. She was wearing a silk kimono and appeared indifferent to the arrival of the police.