Trial starts for scared Minnesota cop who killed Philando Castile

Each moment of the July 6 exchange was captured on audio from Yanez's squad auto and on video.

Anthony Police Officer Jeronimo Yanez, 29, with one count of second-degree manslaughter and two counts of unsafe discharge of a firearm in November. The trial opens this week with jury selection. Reynolds used her cellphone camera to live-stream the shooting's aftermath on Facebook. She calmly explained what had taken place, saying they had been pulled over for a broken tail light. The statements were recorded live on social media and also on police squad auto videos.

FILE - In this July 24, 2016, file photo, protesters chant and dance during a demonstration in front of the governor's residence in St. Paul, Minn., against the July 6 shooting death of Philando Castile by St. Anthony Police Officer Jeronimo Yanez while making a traffic stop in Falcon Heights, Minn. A bystander filmed that deadly encounter as well.

In announcing he was charging Officer Yanez with manslaughter, Ramsey County Attorney John Choi read what was said in the moments leading up to the shooting, filling in the gaps of what the Facebook livestream didn't show.

Phil Stinson, a professor of criminal justice at Bowling Green State University in OH, says police officers shoot and kill people about 900 to 1,000 times per year.

"The mere mention or presence of a firearm alone can not justify the use of deadly force", Choi says.

St. Anthony Police Officer Jeronimo Yanez is on trial for shooting and killing Philando Castile last summer.

It was unclear whether Yanez's immediate family was present, though two rows in the courtroom appeared to be filled with his supporters. Authorities later found Castile had a permit to carry. "Philando Castile moaned and uttered his final words: I wasn't reaching for it". Castile responded, "I'm not pulling it out", and Reynolds said, "He's not pulling it out".

MATT SEPIC, BYLINE: Here on Larpenteur Avenue, a four-lane road that goes through the Twin City suburb of Falcon Heights, police officer Jeronimo Yanez pulled over a 1997 Oldsmobile on the evening of July 6. Yanez fired seven shots in the direction of Castile in rapid succession. Yanez yelled, "Don't move!"

"I'm not sure a conviction will result in justice because this will not get (Castile's) life back".

"He's licensed to carry, he was trying to get out his license and wallet, he let the officer know he had a firearm", Reynolds said during the live feed.

YANEZ: Keep your hands where they are please.

Reynolds: "He just shot his arm off".

"Sir, I have to tell you that I do have a firearm on me", Castile reportedly said, according to court documents.

"I just think that's not a good enough excuse to pull anybody over and then end up dead behind that", he said.

Ramsey County District Judge William H. Leary is presiding over the trial and started proceedings promptly on Tuesday morning. The officer was interviewed July 7 by investigators. Castile had a gun in his pocket when he was stopped.

Prosecutors say Yanez shot Castile, a 32-year-old elementary school cafeteria worker, after Castile told him he was armed. "Dr. King said, 'I have a dream, ' but the dream hasn't come yet". "I think that's the way the system is meant to work".