The family and supporters of Ian Tomlinson, who died after being hit by police a year ago, were to stage a vigil in his memory on Thursday this week.
Ian died on 1 April 2009 after passing by the G20 protests in the City of London.
His widow Julia condemned police investigators saying, “If it had been someone on the street who had pushed and hit Ian just before he died, and it was caught on video, surely something would have happened by now.
“The officer needs to go before a jury.”
The vigil, backed by the United Campaign Against Police Violence, will assemble at Cornhill, near Threadneedle Street in the City of London, at 10.45am.
The organisers are asking people to bring flowers to place at the spot where Ian died.