PHILADELPHIA -- Saturday marks the 25th anniversary of the slaying of Philadelphia Police Officer Daniel Faulkner.

Faulkner, a 25-year-old officer, was shot after he pulled over the brother of Mumia Abu-Jamal on Dec. 9, 1981.

Abu-Jamal, a one-time radio reporter and former Black Panther, was convicted in 1982 and sentenced to death. His case has gotten worldwide attention as some believe Abu-Jamal is the victim of a racist judicial system.

In 2001, a federal judge overturned his death sentence but upheld his conviction. That decision is being appealed, and Abu-Jamal remains on death row.

NBC 10’s Mike Strug spoke with one of the officers who responded to the shooting.

“I remember a nurse tossed me this patrol jacket. It was so surreal, like something you would just see in a movie, said Bill Colarulo.

“She gives me this patrol jacket and there was blood on the jacket, on the badge and I saw the name Faulkner, badge 4669. I was a rookie. I didn't even know who he was."

Twenty-five-years ago Colarulo was a rookie cop assigned to guard the door to the Emergency Room. Now he's a chief inspector who can never forget the night Faulkner died.

"When they brought (Faulkner) into the hospital, he was obviously in bad shape. I remember Joe Shuck yelling, 'Can we get some people here? Let's get some help here.'"

But Faulkner couldn't be saved. He was pronounced dead about an hour later.

That's when Colarulo said remembers was Mumia Abu Jamal arriving, he'd been shot once in the chest.

Colarulo then says Abu Jamal made a confession to his then partner Tom Brady.

"He said to my partner something to the effect, 'I'm glad I shot the M-F’. That’s what my partner said (Abu-Jamal) told him,” said Colarulo.

Kathleen Gerrow, now an executive producer at NBC 10, was a radio reporter back then covering the story.

Gerrow said she also remembers hearing the confession.

"I distinctly remember a very distinctive voice shouting, 'I shot the mother f----er, I shot the mother f----er,” said Gerrow.

That voice, Gerrow said, belonged to Abu-Jamal.

On Saturday, members of the N.Y.-based ‘Free Mumia Abu-Jamal Coalition’ will travel to Philadelphia to hold a demonstration at City Hall.

According to the group’s website, demonstrators will gather at noon and march to the AFSC building on 15th Street and Cherry.