This lawsuit is about the mass arrest in Oakland, California, on January 28, 2012, when the Oakland Police Department and several other law enforcement agencies arrested approximately 360 people in front of the YMCA at 2350 Broadway in downtown Oakland. Most of the arrestees had been marching in a demonstration associated with Occupy Oakland, ‘Move-In Day’. Some neighborhood residents, observers and others were also arrested. The plaintiffs are suing for violations of their civil rights arising from the arrest, and from the confinement on Alameda County Sheriff’s vehicles and in the Alameda County Jail.