Anibal Ortiz / KPCC
Protestors gathered on the steps of Pershing Square on the one year anniversary of Los Angeles' Occupy movement in Los Angeles, Calif., Monday, October 1, 2012. More than 300 protestors gathered at Pershing Square and marched around downtown.
Occupy Los Angeles protesters say the city violated their constitutional rights when the Los Angeles Police Department evicted them from the City Hall park last year.
The group's lawsuit, which was filed on Thursday and seeks class-action status, claims a LAPD raid that resulted in nearly 300 arrests was an unlawful violation of rights to assembly, association, freedom from unlawful seizure and liberty.
The Occupy demonstrators, part of a nationwide anti-Wall Street social movement, took over the park for two months and they were ousted on Dec. 1, 2011 in what the lawsuit calls Police Department "shock and awe" military tactics.
Extra law enforcement, restoration of the property and other city expenses cost taxpayers more than $4 million.