CCTV images released today show the moment before an innocent teenager is murdered, because his killers mistakenly thought he was a member of a rival gang.
Kwame Ofosu-Asare wasn't.
But he was stabbed to death on a housing estate in Brixton.
Today his killers were jailed for life.
Some of you may be upset by some of the images in this report by Piers Hopkirk.
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Police were called to a fight between two groups of people on the petrol station forecourt at Cobham services.
The barriers are part of a series of measures put in place by the Metropolitan Police.
Resident group Justice 4 Grenfell say they were not consulted and will raise concerns about the appointment at the highest level.