They yesterday condemned the "perverse" jury verdict returned on Wednesday over the death of Mark Duggan, who was shot after armed police stopped the taxi he was in as they trailed it through Tottenham, north London, in August 2011.
The jury found Duggan had a gun in the taxi but did not have it in his hand when the fatal shot was fired, having thrown it onto some nearby grass.
Demonstrators chanted "Who are the murderers? Police are the murderers" and "No justice, no peace". They heard calls for all police officers to wear cameras.
A minute's silence was held during the vigil, and 20 white doves symbolising peace were released.
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Speaking from the police station steps -- with few officers in sight -- Duggan's aunt Carole told supporters "Mark is not the first person to die at the hands of the police. There are thousands more.
She said Duggan, a 29-year-old father of six, was not from a gangster family.
Duggan's death was the catalyst for urban riots and looting that spread from Tottenham across London and then to other cities including Birmingham and Manchester in 2011, leaving five people dead.
Tottenham is an ethnically-diverse urban area best known for its English Premier League football club Tottenham Hotspur.
Diane Abbott, the first black woman elected to parliament and the lawmaker for neighbouring Hackney, told the crowd she was hosting a meeting in parliament tomorrow with the Duggans, lawyers and community activists.
She added "There are longstanding issues between the Metropolitan Police in London and the black and minority ethnic communities: stop and search, deaths in custody -- and the death of Mark Duggan has not helped matters at all."
The Duggans are pushing the Independent Police Complaints Commission to pursue a wider, more thorough investigation.