Activists in the city are calling for a nationwide day of protests next week in response to the deadly police officer involved shooting in South Carolina.

The Stop Mass Incarceration Network is spearheading what it calls a National Shut Down next Tuesday.

Participants are being encouraged to not go to school or work that day in protest of the deaths Walter Scott, Eric Garner, and others by police.

Details of the protest are expected to be announced during a news conference Friday on the steps of City Hall.

Meantime, investigators are learning more about the moments before Scott was shot by officer Michael Slager last weekend.

The South Carolina Law Enforcement Division released dash cam video showing what begins as a normal and polite traffic stop. 

Officer Slager pulls Scott over for a broken taillight. 

He then approaches the green Mercedes and asks for Scott's license and registration before returning to his cruiser.

Later in the video Scott gets out of his car and takes off. 

Slager can be heard running after him.

A bystander captured the rest of the incident on cell phone video.

Slager appears to have fired eight times as Scott ran away.

NYPD Chief of department James O'Neill spoke out about the incident Thursday night on "Inside City Hall."

"I've been a cop for 32 years, I can think of no possible reason why that cop would do that.  It's just a wanton disregard for life.  My job is to keep people safe and what happened down in South Carolina is the exact opposite of that," O'Neill said.

Officials in charge of the investigation say crime scene technicians found inconsistencies at the site of the shooting which they say the cellphone video ultimately confirmed.  

Slager could face 30 years to life in prison if convicted.