Around 4:30 p.m. on June 16, 32-year-old Allison Pluck and her daughters Shania Gill, 18 months, and Shameka Gill, 6 months, were discovered dead inside their vehicle while it sat in a school parking lot on a hot summer day in Hagerstown.
According Bruce Goldfarb of the Baltimore Medical Examiners Office, Pluck and her daughters' heatstrokes were brought on by environmental heat exposure and hypothermia.
Surveillance footage shows shows Pluck park the car in the school's employee lot just after 6 a.m., where it remained undiscovered for nearly ten hours.
Meteorologists report temperatures reached nearly 90 degrees the day of the incident.
It remains unclear why Pluck would sit in the sweltering vehicle for such a long period of time, especially since there is no connection between the family and the school where they were discovered. Intentional murder and suicide have been ruled out, as police suspect Pluck suffered an acute mental breakdown and could not foresee the potential danger of briefly resting in the car.