Buffalo Officer Fatally Shoots Driver During Traffic Stop

Officer clung to speeding car before firing; 6-year-old passenger unharmed

Bodycam footage shows the officer pleading with the driver to stop before firing.
The driver, Dae'von Roberts, had a loaded handgun in the car.
Roberts attempted to flee after being pulled over for speeding and tinted windows.
Police Commissioner justified the use of force citing officer's imminent danger.
New York State Attorney General has opened an investigation into the incident.