Emmanuel Ogabi, 26, lay on the street overnight for hours dying from a single stab wound in Sandy Hill Road.
He lay on the ground until someone reported a man collapsed in the street to police at 7.48am the next morning.
Paramedics and police rushed to Sandy Hill Road where Mr Ogabi was pronounced dead at the scene.
A post mortem found the cause of death to be a single stab wound.
The murder investigation is being led by Detective Chief Inspector Richard Leonard, from the Met’s Specialist Crime Command.
Mr Ogabl is believed to have been attacked by a group of men a few hours before he was found.
DCI Leonard said: “We are specifically appealing for anyone who was in Burridge Place or Sandy Hill Road from 11.40pm to 11.45pm on Wednesday, 20 October.
“Analysis of CCTV footage shows Emmanuel was surrounded by a group of males and we would like to identify who they are.
“Similarly, please check any doorbell or dashcam footage in case you have captured something that could prove useful for our investigation. No piece of information is too small.”
There have been no arrests at this stage.
To provide information, call the incident room on 0208 721 4622.
To remain completely anonymous phone Crimestoppers on 0800 555 111.
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