On September 21, 2016, five-year-old Koi Green and her four-year-old sister Kaleigh Green were killed in Dearborn Heights, Michigan, when their father, Gregory Green, poisoned them with carbon monoxide inside a car. After the girls died, their father brought their bodies into the home and placed them in their beds. Koi was described as an African American child who loved school, was learning Spanish, enjoyed dressing up, and took part in cheerleading and ballet.

That same day Gregory Green shot and killed his stepchildren, 19-year-old Chadney Allen and 17-year-old Kara Allen, in the basement. Their mother and Gregory’s wife, Faith Green, was bound with duct tape and zip ties, cut with a box cutter, and shot in the foot; she survived. Gregory Green then called 911 and was taken into custody on the porch when police arrived. Investigators found a hose from the car’s exhaust had been run into the vehicle. Faith Green had recently filed for divorce, which is reported to be the believed motive.

If anyone knew Koi or her family or has information about what happened that day, please share what you know with the authorities.