There is no drug that is going to shed trustworthy light on Holmes' state of mind last year when, police say, he donned agas mask as well as full body armor and grabbed a rifle, a pump-action 12-gauge shotgun and at least one .40-caliber semiautomatic pistol to launch a heinous attack.
But since at least May, the margin between crude and wholesale gas prices has increasingly shrunk, according to AAA's Fuel Gauge Report, a daily updated indicator of retail gasoline prices.