4 of 75: A worker with the Downtown Oakland Association sweeps the sidewalk near graffiti that reads " You can't shoot us all" outside a drug store in Oakland, Calif., Friday, July 9, 2010. The federal government said it will step in after officer Johannes Mehserle was convicted Thursday of a lesser involuntary manslaughter charge, touching off angry protests that damaged stores and netted dozens of arrests. The jury had a choice between second-degree murder and lesser charges of voluntary and involuntary manslaughter for Mehserle who is accused of killing an unarmed black man on a crowded train platform on New Year's Day in 2009. (AP Photo/ Eric Risberg)

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