Investigators say Malik Williams, 19, ran out of the Garfield Police Department Saturday while being processed for a domestic violence arrest.
Police tracked him to the garage of a private home.
When officers opened the door, they say Williams was armed with tools he'd gathered from the garage.
Two officers opened fire, striking Williams numerous times.
He was brought to Hackensack University Medical Center where he died.
Two officers involved in the shooting were also taken to the hospital, but are not seriously injured.
Diana Copin's family watched the pursuit unfold.
"They saw the cops chasing someone in the backyard," Copin said.
Neighbors say they heard five shots back to back.
And very soon after there were police, detectives and ambulances left and right.
The prosecutor's office says, "The suspect was encountered and shots were fired by both Garfield Police and Bergen County Police. The suspect was brought to Hackensack University Medical Center and pronounced dead."
The Bergen County Prosecutor's Office is investigating this incident as a police-involved shooting.