The officer who struck Ian Tomlinson before his death at the G20 protests will face disciplinary proceedings for alleged gross misconduct.
Metropolitan Police Commissioner Sir Paul Stephenson informed the Home Affairs Committee on Tuesday morning.
He said the force should move "swiftly with proceedings".
In a statement, Mr Tomlinson's family said there was an "overwhelming argument" for the proceedings to be held in public.
Last week, the director of public prosecutions said there would be no criminal proceedings over Mr Tomlinson's death.
Pc Simon Harwood, a member of Scotland Yard's territorial support group, was filmed striking the 47-year-old newspaper seller with his baton and pushing him to the ground in the City of London on 1 April 2009.
Sir Paul told a meeting of the Commons Home Affairs Committee he was "disturbed" by the amateur video footage showing the incident.
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www.bbc.co.uk/news/uk-england-london-10777287