A woman in Biddeford was shot to death by a police officer while holding what turned out to be a BB gun. Biddeford’s police chief says the woman was shot three times on a Main Street sidewalk last night after refusing several orders to drop the gun. He says one of the officers fired when the woman approached him in a threatening manner. It started with a 911 call by a woman threatening to kill herself. The chief says the whole incident was caught on a camera mounted inside a police cruiser. The attorney general’s office is investigating.