the economy of downtown Oakland, and cited reports of fire hazards in the camp. Occupy protesters interrupted the press conference by chanting, "We are the 99 percent of Oakland." The council members counter chanted: "Occupy Oakland must go." The press conference ended earlier than anticipated. Oakland city officials estimated the Occupy movement cost the city $2.38 million in police overtime pay, private security and mutual aid, not including costs of the Port of Oakland protests and not accounting for insurance policy reimbursement. The estimate was a revision of the $5 million figure provided by Mayor Quan. Police conduct and controversies Throughout the time of Occupy Oakland protests, there were numerous complaints of alleged police misconduct coming from their actions in relation to the Occupy Oakland protesters. Scott Olsen head injury on October 25 On October 25, 2011, Scott Olsen, a 24-year-old former Marine and Iraq War veteran, suffered a skull fracture caused by a projectile that some witnesses claimed was a tear gas or smoke canister fired by police. A video by protesters shows an explosion of something near protesters attempting to aid Olsen. The Associated Press later reported that it was not known exactly what kind of object had struck Olsen or who had thrown or fired it, but that protesters had been throwing rocks and bottles. The Guardian reported that a projectile found near where Olsen fell was a bean bag round although they could not confirm if that round hit Olsen. Olsen was rushed to the hospital where doctors said that he was in critical condition. At least two other protesters were also injured. The American Civil Liberties Union and National Lawyers Guild are calling for an investigation into the alleged use of excessive force by Oakland police. The investigation by the Citizens Police Review Board is lasted several months. Olsen served two tours of duty as a data network specialist in the Iraq War, was awarded seven medals (including the Navy-Marine Corps Achievement Medal), and received an administrative discharge as a lance corporal in November 2009 after serving four years. While still an active-duty servicemember, Olsen created a website called "I hate the Marine Corps" as a forum for "like-minded grunts to vent". Despite the site's title, Olsen insists he doesn't in fact hate the Marine Corps, nor does he regret his enlistment. At least 1,000 people held a candlelight vigil for Scott Olsen in front