Police in Streatham Hill are appealing for a late-night dog walker, who may have witnessed a sexual assault, to come forward.
Officers from the Sapphire unit, a team that deals with rape and sexual assault, say a female victim was reportedly assaulted and held against her will in a home on Tierney Road on the night of November 6 last year.
They are keen to speak to the dog walker, as well as anyone else who may have remember a row or disturbance in the road that night.
Anyone with information is urged to call Rob Way on 0208 649 2417. Alternatively you can call crimestoppers anonymously on 0800 555 111.
Three men and one woman have been arrested and charged in relation to this offence and remain in custody.
