An 18-year-old student, Henry Nowak, was handcuffed after being stabbed by Vickrum Digwa, 23, who lied to police at the scene, claiming he had been the victim of a racist attack.
Digwa has been jailed for life with a minimum 21-year term.
BBC Verify has analysed bodycam footage that was released by the police, with the permission of Nowak's family, and looked at the key moments before Henry Nowak's death.
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