Police comb the waters of an estuary in Oakland, searching for the gun used in a shooting spree that killed seven people earlier this week.<br/> <br />Authorities are using police divers and boats equipped with sonar technology to aid in the search.<br/> <br />The suspect in the shootings at a small Christian college in Oakland is 43-year-old One Goh.<br/> <br />He stands charged with murder and attempted murder.<br/> <br />The former student at Oikos University is accused of opening fire on former classmates and staff, in the deadliest gun violence at a U.S. college since a Virginia Tech student killed 32 people in 2007.<br/> <br />The motive for this week's shooting remains unclear, but police said Goh had "anger management" issues.<br/> <br />Travis Brecher, Reuters
