ST. PAUL, Minn. -- A suburban Minnesota police officer who killed a black driver reacted to the man's gun, not his race, his attorney said Saturday, giving the most detailed account so far of why the officer drew his own weapon.

Philando Castile's girlfriend, who streamed the immediate aftermath of the shooting live on Facebook, has said he was shot several times after telling the officer he had a gun and a permit to carry it.

St. Anthony Police Officer Jeronimo Yanez was reacting to "the presence of that gun and the display of that gun" when he opened fire on Castile, Minneapolis attorney Thomas Kelly told The Associated Press. He declined to elaborate on how Castile displayed the weapon or what led up to the deadly Wednesday traffic stop.

Reynolds said Castile was shot while reaching for his wallet. In the video she streamed Wednesday night on Facebook Live, Reynolds describes being pulled over for what the officer told her was a "busted tail light." The video shows her in a car next to a bloodied Castile slumped in a seat.

Get Breaking News Delivered to Your Inbox

"At the end of the day, it's their word against ours, and I just wanted the people to see that we didn't do this to ourselves," Reynolds told CBS News correspondent Anna Werner on Friday.

She told Werner she doesn't think the way to answer incidents like Castile's death is through violence, saying that Castile would be hurt, sad and devastated over the deadly attack in Dallas the next night that killed five police officers.

"Violence is not the key," Reynolds said. "Us coming together, standing together is what makes our voices be heard."

In the video, a clearly distraught police officer stands at the car's window, tells her to keep her hands up and says: "I told him not to reach for it. I told him to get his hand out."

"You shot four bullets into him, sir. He was just getting his license and registration, sir," Reynolds calmly responds.

Yanez "was reacting to the actions of the driver," Kelly said. "This had nothing to do with race. This had everything to do with the presence of a gun."

Yanez, who is Latino, is distraught and saddened over the shooting in the St. Paul suburb of Falcon Heights, Kelly said.

Falcon Heights, a mostly white community of 5,000, is served primarily by the nearby St. Anthony Police Department.

Authorities say that during the traffic stop, Yanez approached Castile's car from the driver's side and another officer, Joseph Kauser, approached from the passenger side. Yanez opened fire, striking Castile multiple times.

Yanez and Kauser, both four-year veterans, were put on administrative leave, as is standard, authorities said.

The Minnesota Bureau of Criminal Apprehension said several videos, including squad car video, have been collected, though St. Anthony officers don't wear body cameras.

Court records show it was at least the 32nd time Castile had been pulled over in the Minneapolis-St. Paul area since 2002.

Saturday marked a third straight day of protests over Castile's killing, with demonstrators encamped outside the governor's mansion in St. Paul. About 30 protesters formed a circle in the street late in the morning as an organizer prayed for peace and togetherness.

Authorities in St. Paul had reported just a single arrest of someone who had been in a crowd that at one point numbered 1,500 people, there to demand justice in the death of Castile, a 32-year-old school cafeteria supervisor.

Gov. Mark Dayton, who has come out of his residence several times to meet with the protesters, said Friday that he endorsed their right to be there and had no intention of ordering them removed.

Ramsey County Prosecutor John Choi said Friday that the Facebook video is part of what he hoped would be a "prompt and thorough investigation" by the state into Castile's killing late Wednesday.

The following night, five police officers were fatally shot and others were wounded during protests in Dallas over Castile's killing and the fatal police shooting of 37-year-old black man Alton Sterling in Baton Rouge, Louisiana, after a scuffle with officers outside a convenience store. Authorities identified the Dallas shooter as an Army veteran, who was later killed by police.

Sterling's and Castile's families have denounced the Dallas officers' killings.

"My son would not have approved of the shootings," Valerie Castile told CNN Friday night, "because he believed that all lives matter."

Less than 24 hours after Castile died, Dayton declared that police likely wouldn't have fired if Castile's skin were a different color.

"Would this have happened if those passengers would have been white? I don't think it would have," Dayton said to the crowd outside his residence Thursday.

Dayton said Friday that he stood by that statement and had no new information about the case, even as the head of a law enforcement organization ripped his comments as reckless.

Dennis Flaherty, executive director of the Minnesota Police and Peace Officers Association, called Dayton's comments an "extraordinarily presumptive conclusion" that could lead to more violence.