It is not polite to shoot yourself in the brain while paying the bill.
KDFW-TV, Dallas/Fort Worth, said Canady, who has a concealed-weapons permit, was reportedly reaching for his wallet in the checkout line but grabbed the pistol he was carrying instead. The gun went off, wounding Canady in the buttocks. The bullet then hit the floor and sent fragments into the other two victims.
An off-duty officer saw the incident and confronted Canady, who allegedly ran off.