Los Angeles Times | California attorney general subpoenas oil refiners in gas-price probe Los Angeles Times State Atty. Gen. Kamala Harris has issued subpoenas to oil refiners as part of an investigation into unusually high gasoline prices in California during the last year. California drivers paid pump prices that have been as much as $1.50 higher than the ... California probing oil companies for alleged manipulation of gas prices: Report California Attorney General Investigating Major Oil Refiners California Oil Refineries Investigated by State Attorney General |