Winston Silcott told a public meeting in Tottenham, north London, that people should come out in force to demand justice for Mark Duggan’s family.
He said, “We have to be like an arrow and shoot straight for that goal”.
The inquest into Mark’s death opens next month. His killing by the police sparked riots in the summer of 2011.
Winston was wrongly jailed for the murder of PC Keith Blakelock in the 1985 Broadwater Farm riot. His conviction was quashed in 1991 after it was proved that supposed confessions had been fabricated.
The Tottenham meeting took place last Saturday. The previous day, the Independent Police Complaints Commission (IPCC) announced it had found no evidence of criminality in police actions around the shooting of Mark Duggan.
None of the 11 firearms officers present on the day has been interviewed under caution.
Officers—including V53 who fired the fatal shot—were allowed to give their evidence in writing rather than facing cross examination by the investigation.
The IPCC report is due before the end of August. Mark’s family has expressed frustration at the IPCC’s behaviour, and is looking to the inquest to find out more about what happened.
Inquest juries have previously disputed IPCC findings. Most recently a jury recorded an unlawful killing in the case of Azelle Rodney.
Some 450 campaigners and local residents packed into North London Community Centre in Tottenham to mark the anniversary of Mark Duggan’s death and that of Joy Gardner.
It is 20 years since Joy died after police and immigration officers restrained her as they raided her home in 1993.
The meeting, Justice Delayed is Justice Denied, heard from families who had lost loved ones after they came into contact with police and who are still seeking justice. They included family members of Cynthia Jarrett, Roger Sylvester, Christopher Alder and Sean Rigg.
The meeting heard how no one had been held accountable for the death of Joy, who was bound and gagged with 13 feet of tape around her head.
The audience watched the documentary Justice Denied made by Ken Fero. Several members of Joy’s family then spoke, including her son Graham and mother Myrna Simpson.
Myrna said, “The pain is so great. All I can do is go to the cemetery for Joy. People’s eyes should be opened. It’s one law for the police and another for us”
Carole Duggan, representing Mark Duggan’s family, also spoke. She paid tribute to Mark’s peaceful character and said she did not recognise the portrayal of him in the media.