65-year-old Ruth Burger allegedly drove into the entrance of the store, hitting Danah McKinnon-Bozek and her two young daughters. McKinnon-Bozek was pregnant at the time, and had to deliver a baby girl by C-section.
The newborn girl, named Rhiannon, along with McKinnon-Bozek's 6-year-old daughter Addison Hall, later died in hospital.
Burger was charged with criminal negligence in Addison Hall's death. She is now facing a new charge of criminal negligence causing death in the case of the newborn girl. Burger is expected to appear in court in October.
McKinnon-Bozek and her other 3-year-old daughter have since recovered from serious injuries sustained in the incident.