OAKLAND -- An extensive search probed the depths of a local waterway Tuesday as authorities worked to find the gun used in a shooting spree that killed seven and wounded three at a private college in East Oakland. Oakland police cordoned off a stretch of the Oakland Estuary in the 7200 block of Doolittle Drive for most of the day as they deployed a police boat and a robot borrowed from San Francisco police that can conduct underwater searches. A police helicopter... (GunPolicy.org)