Hundreds of protesters block the streets of Chicago in anger over police shooting of unarmed black teen Paul O'Neal

Demonstrators in downtown Chicago have blocked streets and traffic while protesting the fatal shooting of unarmed black teen Paul O'Neal by police.

O'Neal was gunned down by officers back in July after he stole a car and got into a chase with cops which ended in the city's South Shore neighborhood.

Footage of O'Neal's death, released last week, has caused outrage in part because the bodycam belonging to the officer who fired the fatal shot was not turned on.

Protesters, organized by a group of Chicago high school girls according toCBS, gathered Sunday evening in Millennium Park.

Ashanti Lumpkin, 17, addressed the crowd inside the park, according to theChicago Sun Times.

She said: 'We are here today fighting for the people, six feet under, whose death ignited a nation.

'We are here today to fight so the next generation won’t have to. We are here today to let them know that we will not go away.

'We will not be silenced. And we will keep fighting until justice is won. Enough is enough.'

Protest organizer Maxine Wint added: 'We knew they killed him before [the video], but seeing the videos and seeing how they acted with each other, it just made it seem like our lives don't matter.'

Taking off through downtown streets lined with police officers, the activists at time blocked portions of Michigan and Chicago avenues and Adams, State and Lake streets.

While some high-fived officers as they walked, others sung chants comparing them to the KKK, taunted officers and even spat at police cars.

Chicago Police Superintendent Eddie Johnson has raised concerns over the footage, admitting officers were at fault for firing at the vehicle O'Neal was driving even before they fatally shot him in the back.

According to Chicago department policy, officers should never fire at a moving vehicle unless the occupant is armed and firing back.

Footage also shows O'Neal handcuffed and face down on the ground in a growing pool of blood while cops seem to discuss turning their body cameras off.

Release of the O'Neal shooting video was the first under a new policy that calls for such material to be made public within 60 days.

The policy was changed after public outrage last year following months of delay in releasing video that showed black teenager Laquan McDonald being shot 16 times.

Johnson attempted to explain the missing footage by saying the officer in question had only been using the camera for a week and so didn't know how to operate it.

But demonstrators pointed out that it is extremely convenient that the only cop's camera that wasn't working was the one who fired the fatal shot.

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