PC Blakelock curled up in a ball and screamed for help as a mob hacked him to death during the Broadwater Farm riots, an eyewitness has told the Old Bailey.
Using the pseudonym John Brown and with his voice distorted by a modulator to protect his identity, the witness described how he saw the killing on the estate in Tottenham, north London, on October 6 1985.
He explained that he had seen Nicky Jacobs, 45, stabbing PC Blakelock with a machete between two and four times as the frenzied mob took part in a "free for all".
More top news
Parents of obese children rarely spot that their child is overweight, doctors warn.
Staying windy tonight with outbreaks of heavy, showery rain. Minimum temperature 8C.
Police found two men on the tracks at Old Street at the weekend.