The young mother had sustained a single gunshot wound to the head and emergency response teams performed “lifesaving efforts” at the scene.
At the time, police said the woman was transported to a local hospital and that she was “fighting for her life” after being left in “grave condition” due to her injuries.
"Fortunately, the child was not injured, but a bullet did enter the rear window where the child was seated," police said in the release.
Police confirmed three days later that Ms Flores had died of her injuries. “Sadly, Jacqueline Flores passed away on Friday evening from the injuries she received,” they said.
Authorities called the attack a “senseless act of violence” and said that they believed the crime may have been a case of “mistaken identity”.
“Investigators do not believe that Ms Flores was the intended target and this senseless act of violence may have been a case of mistaken identity,” they said.
Police are asking anyone in the city who may have information regarding the incident to contact Fresno Police Department.