A private autopsy has revealed that eight of the 20 shots fired at Stephon Clark made contact, with seven of those shots striking him from behind.

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The news was revealed by Dr. Bennet Omalu during a news conference in Sacramento, California, with Omalu saying that Clark's death was not instantaneous, but "took anywhere from three to 10 minutes."

A report from NBC News detailed the first shot:

"The first shot by Sacramento police officers hit Clark in the left side and back of the chest, with the bullet’s propulsion probably forcing him to spin around so that his back faced the officers completely, Omalu said. The shot fired from the front struck him in the lower part of his left thigh, indicating that Clark was shot while he was either on the ground or falling close to the ground, according to Omalu."

The doctor concluded that Clark's death was caused by a combination of blood loss, acute respiratory arrest and hypoxia, or a lack of oxygen reaching the brain.

Prior to the autopsy, police audio and video of Clark's death was released, with both contradicting initial statements made by officers following the shooting.

Body camera footage from one of the two officers, footage from the sheriff's helicopter overhead, as well as the 911 call and dispatch audio were released Monday evening. Both the helicopter footage and body-camera footage contradict statements officers gave about the incident. Initially, cops had said that Clark charged at them but both videos show him slowly walking through the yard, only to be shot by the officers within seconds of encountering him.

The body-camera footage also showed the officers emerging from their hiding spot, with one of them yelling "Show me your hands! Gun! Gun! Gun!" before firing their weapons at him. The pair continues to yell for Clark to show his hands even after he's already on the ground and no longer moving.

Source: NBC News