50-year-old Helen Duncan, of Glendora, California was in the local Sam's Club Sunday afternoon with her husband, 48-year-old Robert.
Helen was carrying a handgun inside of a fanny pack when she dropped the fanny pack and the gun unintentionally discharged.
The bullet struck Robert in the arm. The couple drove to the hospital where Robert was treated.
After leaving the hospital, the couple was arrested and charged with negligently discharging a firearm and illegally possessing a concealed firearm without a permit.