The Maricopa County Attorney's Office said it would not press charges on the officer.
Brisbon's friend says the officer shouldn't have fired his weapon and should be held responsible.
Brisbon was unarmed and taking a bag of McDonald's food to his daughter, moments before a Phoenix Police officer shot him twice.
Those are the facts that everyone can agree on, but what is still being debated is what happened in the 30 seconds after Brisbon got out of his SUV to drop off the food.
"The last words were I'll be right back," said Robert Brandon Dickerson.
Dickerson was in the passenger seat of the car.
"I heard the pop, and when I heard the pop I froze again, and I got out and backed up from the truck," he said.
According to the police, Officer Mark Rine was responding to reports of a drug deal. The officer approached Brisbon, who ran and a struggle ensued.
Investigators say Brisbon put his hand in his pocket. The officer thought Brisbon was reaching for the handle of a gun, but it turns out it was a pill bottle.
"The sequence of the shots were not pow pow; they were pow (pause) pow," said Dickerson.
Dickerson admits he did not see the shooting, and in a police interview that was recorded after the shooting, he says he doesn't think the shooting was the officer's fault.
"The police... it's not the police, I know that's not what it's about, it's not the police's fault... he didn't go in there like some Darren Wilson (expletive); he didn't go in there trying to kill nobody," said Dickerson during the interview.
Now Dickerson is among the many calling for a federal investigation, saying the officer unjustifiably shot Brisbon.
Maricopa County Attorney Bill Montgomery has said the officer will not face criminal charges in Brisbon's death.
"If he didn't comply in the manner the police officer wanted him to comply in, it still didn't give him a reason to shoot him," he said.
On Monday, the advocates for Rumain Brisbon plan to send a letter to the U.S. Department of Justice calling for a federal investigation.