Flynn said he was prepared to charge the officers on Friday, but he "didn't want to pour gasoline on the fire" after he learned 57 officers resigned from the Emergency Response Team on Friday and "they weren't going to come last night to protect the city of Buffalo."

Flynn was concerned about the safety of the city, protesters and the officers Friday night.

They are upset and want answers."

Mayor Byron Brown told CNN's Chris Cuomo on Friday night that he was told that emergency response team officers are trained to keep moving forward.

"Embedded with them are medics, officers with first-aid training," he said.