A suspected killer filmed the dying victim with a gleeful comment and then shared the clip on social media.
Darren Augustine, 44, was fatally stabbed after an argument and was seen lying face up in footage.
The suspect then spread it on his Snapchat Report to brag about how father of two was ‘fobbed off’.
It is understood Darren went to a house in Brentford, west London, known locally as a drug store, on April 26 over a “personal dispute”.
He was stabbed in the chest and stomach and collapsed outside.
The video showed the lifeless victim, wearing a hoodie, lying next to a car with his arms stretched over the curb and blood on his forehead.
In the clip, the suspect aimed the camera at Darren’s lifeless body while he boasted to his social media followers, saying: “Guys I don’t know what the man is up to bro.
“Run into my garden, you’ll finish, brother.”
Police arrested eight men and three women, ranging in age from their mid-teens to their 60s, and released them on bail.
It is understood they are still searching for the person who took the video.