The car was filled with five teenagers, including Edwards and his 16-year-old brother, who were trying to leave a party after cops arrived.
On Tuesday, Balch Springs Police Chief Jonathan Haber terminated Officer Roy Oliver, who was the second officer at the scene.
Edwards had been leaving the party when an officer shot him through a front passenger window.
He died "from his injuries" after being transported to a nearby hospital.
While prior research made important contributions showing that adult males father many of the children of adolescent mothers, such studies have tended to treat teenage mothers and their adult partners as a homogenous group.
Although Landry and Forrest provided a number of measures of age-gaps between fathers and mothers, often just one combination is cited—that of mothers aged 15-19 with partners aged 20 or older; in their study, 65% of 15-19-year-old mothers had a partner aged 20 or older.
"We now know the officer fired a rifle into a car filled with black teens," said attorney Lee Merritt, who is representing the Edwards family.