【Eric Falk】

Terrence Sterling,Eric Falk 31, was riding a motorcycle during the last minutes of his life.

Sterling was shot and killed by a Washington, D.C. police officer on Sept. 11, and the police body camera footage from the man's final moments was released by D.C. officials on Tuesday.

Officer Brian Trainer shot Sterling, but didn't turn on his body camera until after the fact.

Warning: This video contains graphic footage some viewers may find disturbing.

In the video, officers pump Sterling's chest as the man's blood runs down the sidewalk and a woman screams in the background.

Police say officers were looking out for a "reckless" motorcyclist at around 4 a.m. when they came across Sterling. Sterling allegedly drove into the passenger side door after Trainer, 27, had stepped out of the police car. Then, Trainer shot him.

Police said Sterling sped into the passenger door on purpose, while witnesses said he could have done nothing to avoid the crash.

In the days after the shooting, officers in the city were told to confirm that their body cameras were on before they started interacting with citizens. 911 dispatchers have also been advised to remind officers to do so.

Trainer and his partner officer were both put on administrative leave.

Protesters demanding answers about how and why Sterling was killed demonstrated at around 4:30 a.m. on Monday, cutting off traffic for morning commuters driving into the capital city.

During the demonstration, the group chanted "We have questions. We need answers."

Though city officials released Trainer's body camera footage, it didn't do much to answer many questions about the case.

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