Gascon said as soon as he's sworn in, there will be big changes. Prosecutors will stop asking for the death penalty and will withdraw death penalty filings in current cases. At least four controversial police shootings will be re-investigated, and juveniles will be treated as juveniles.
"I said we will not prosecute children as adults, and I said we will do that from day one," he said.
MORE: DA-elect George Gascon plans to reopen at least 4 cases
A current case Gascon finds troubling is the shooting death of 18-year-old Andres Guardado by L.A. County sheriff's deputies. At last week's coroner's inquest into the shooting, the two deputies at the scene and the detectives investigating the shooting refused to testify.
"Extremely disappointed. I've never seen that before, where investigators are refusing to cooperate with the investigation," he said. "To take the fifth by the investigators, I find extremely troubling."
Gascon has already begun meeting with community groups of all stripes - including a somewhat contentious meeting with Black Lives Matter activists after he won the election.
"Do your job, or we will come to your house. We will come to your office," activists said.
"I pushed back hard. First of all, I'm not going to be intimidated by anybody," Gascon said.
DA-elect George Gascon sets tone for term by meeting with Black Lives Matter organizers
The former L.A. cop and former San Francisco DA has dealt with plenty of conflict before - including an incident at his San Francisco home in 2018.
"When the person called me a coward, I almost want to say the barrio came out of me. Where I grew up, those are fighting words. You can call somebody a lot of things. But you never talk about their mother, never talk about their girlfriend or call them a coward," Gascon said.
It may take political courage to pursue the agenda Gascon is advocating. Does he consider the DA job a stepping stone to higher office?
"I will never say never because I don't know...but you might say that if you look at my policies and the things that are coming out on Monday, you might say that's the end of his political career," he said.
Watch Marc Brown's full interview with Gascon in the video above.