The man was found dead in the alleyway next to The Wheatsheaf pub on Tuesday, 9 December, around 3.30pm.
Road closures on Kingston and Chessington Roads have since been lifted.
Officers are asking anyone with CCTV, dashcam, or mobile footage from around 3.20 to 3.30pm to come forward.
Anyone with information is urged to contact police on 101.



