After participating in a riot following a Kill the Bill demonstration, a 24-year-old woman was sentenced to three years imprisonment.
Judge Julian Lambert stated that Charly Pitman encouraged others in violence against police following a march through Bristol.
After a three-day trial, she was found guilty of rioting but denied the charge.
Jurors were shown footage showing Pitman attacking officers at a city police station and striking their helmets and shields.
Her actions had caused officers and other personnel to be afraid for their safety, according to the court.
Judge Lambert stated that Pitman was conscious of his decision to stay in the area.
He said that jurors had quickly decided there was no basis for self-defence, as Pitman claimed during his trial in April.
Pitman, a Brislington resident, was the 19th person in prison for the riot of 21 March 2013.
After thousands of protestors gathered in Bristol against the Police, Crime, Sentencing and Courts Bill, the disorder was created.
Later that day, the protest became violent in front of the Bridewell police station.
According to the Somerset and Avon Police, those currently in prison for offenses committed during the riot received sentences totalling 74 years and nine month.
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