A Houston woman faces a charge of negligent homicide after police say she fatally injured her three-year-old son in a game of chicken with her vehicle and two other kids.

The Associated Press reports that 26-year-old Lexus Stagg was seen in surveillance footage on June 11 backing her Lincoln Navigator SUV out of a space at her apartment complex, then driving forward as her three children ran toward the vehicle. Two kids were able to move, but the three-year-old was caught under a tire.

Harris County District Attorney Kim Ogg told the AP, "Cars aren't toys and playing chicken with your kids isn't a game."

KTRK-TV reports that Stagg originally told police the incident was an accident, and that she'd backed into the child. Surveillance footage showed this was not the case.