The California Senate passed a bill on Friday requiring local law enforcement to search a database of firearms owners in most cases when carrying out checks on people who may harm themselves or others. The move follows the Isla Vista killings in Southern California in May, when 22-year-old Elliot Rodger fatally shot and stabbed six people before killing himself near the University of California Santa Barbara campus. Less than a month before the killings, local law enforcement carried out a “welfare check” on Rodger.