Three women suspected of shoplifting in a Houston, TX Walmart were chased from the store by a uniformed off-duty sheriff's deputy and when they attempted to drive away one was shot and killed, as detailed in this article and this one. Two young children were in the car at the time but weren't injured. The dead woman had been banned from entering any Walmart due to previous shoplifting offences.
This is a particularly interesting incident in that it comes a short time after this event in a different part of the country. While the Walmart security guard, who ran out of the store in pursuit of the women in order to kill one of them, will receive three days paid leave from his deputy's duties with Harris County, the individual that killed two burglars IN HIS OWN BASEMENT is behind bars with a $2 million bail requirement.