Moore received a huge ovation from hundreds of demonstrators who have re-established their camp at Frank Ogawa Plaza.
"It happened organically, from the grassroots, the true grassroots, and in my lifetime I have never seen a movement like this take hold this fast with this many people all across the country," Moore said.
Moore's welcome was in stark contrast to the one received by Mayor Jean Quan Thursday night when she was heckled and booed by the crowd.
"I wanted to talk with them. I stayed here most of last night, went over quickly for an OEC meeting and then came back, I tried to talk to them, we still want to talk with them," Quan said.
Earlier, Oakland Police Chief Howard Jordan told ABC7 he visited Iraq War veteran Scott Olsen, injured during the protest Tuesday night.
"To express our concern over what happened to him and to let him know that it wasn't something we intended to happen, it was an unfortunate incident, and that we're sorry that it took place," Jordan said.
Oakland civil rights attorney John Burris says he has been contacted by several demonstrators interested in suing the city over police actions Tuesday night.
"We are evaluating each one of those to determine if constitutional rights have been violated," Burris said. "No decisions have been made as to whether any litigation is going to take place."
At the very least, it appears the events of this week have drawn a few new faces to the movement, like Iraq War veteran Dave Bischel.
"It was last Tuesday night here in Oakland, what the Oakland Police Department did to a fellow Iraq veteran when he went down, it kind of motivated me," Bischel said.
Quan says she is taking a day-by-day approach to the camp. Health inspectors will be monitoring the situation and taking tours of the encampment to check on the conditions.