Officials say a 13-year-old girl accidentally shot herself Sunday afternoon in the Sam's Club parking lot in Sherman. The girl was sitting inside a car in the parking lot, when witnesses say the incident occured. Sherman police officers say the girl was waiting in the car while her parents were inside the store shopping. Witnesses say she found her father's gun inside the car, and she shot herself in the leg. She was taken to Wilson N. Jones hospital. Her condition was not released at the time of the incident.