The shooting happened during a police pursuit in the city of Marksville on Nov. 3, 2015. The video, obtained by The Associated Press, shows the chilling moment when police corner the father's car and fire on the vehicle, and the aftermath when the officers check inside the car.
As the officer wearing the body camera walks toward the vehicle, he shines his flashlight on the driver's side, where a man is seen hanging part way out of the window.
As the officers on scene check the car, one of them asks the officer wearing the body camera, "They got any weapons on them?"
"I have no idea," the officer responds.
Another officer walks over to the passenger's side of the car with a flashlight and walks back. He says, "They got more than one subject in there too, you know that right? On the passenger's side."
The driver of the car, Christopher Few, was critically wounded and ultimately survived. But his 6-year-old son, Jeremy Mardis, who was in the vehicle with him, was killed, police said.
Family members told the AP that the young boy was autistic and non-verbal.
"He was the most loving child you could have met," Cathy Mardis said of her grandson during an interview in December 2015. "He was always smiling and happy."
Mike Edmonson, the head of the Louisiana State Police, has called the body-cam footage showing the shooting "the most disturbing thing I've seen."
"Nothing is more important than this badge that we are wearing on our uniform," Edmonson said during a news conference on Nov. 7, 2015. "This badge has been tarnished by the following two individuals."
The Louisiana State Police did not immediately respond to ABC News' requests for comments today regarding the video's release.
The body camera footage was formally introduced as evidence during a hearing Wednesday in the murder cases against Stafford and Greenhouse. State District Court Judge William Bennett allowed reporters to make copies of the video, according to the AP.
The attorneys for Stafford and Greenhouse could not be immediately reached by ABC News for comment on the video.
However, the attorneys have argued that the deputies acted in self-defense and claimed that Few drove recklessly while leading officers on a two-mile chase and then rammed into Greenhouse's vehicle as he was exiting it, before he and Stafford opened fire, according to the AP.
"Christopher Few was a suspect before they knew that child was in the car," said one of Stafford's attorneys, Christopher LaCour, according to the AP.