Last year's fatal shooting created worldwide debate after Reynolds turned on her cellphone during the traffic stop and live-streamed the encounter on Facebook.
Mr Castile hands over the registration and informs the officer that he is carrying a firearm, which he was licenced to carry. "I can keep you safe", she says. The video does not show what happened inside the vehicle or what Yanez saw.
"Being that the inside of the vehicle smelled like marijuana, I didn't know if he was keeping it on him for protection from a drug dealer or anything like that, or any other people trying to rip him", Yanez testified.
While Yanez was recently acquitted of manslaughter and other charges, the dash-cams release has Tom wondering if the jury made right decision.
Steven Belton is president and CEO of Minneapolis Urban League.
The heartbreaking video is causing people on social media to say they watched it with tears in their eyes. However, as Tom pointed out, Castile's gun was nowhere in sight.
This in-squad video is intense footage of a traumatic situation that the 4-year-old girl endured. She says it was obvious to her from the video that Castile was complying. Yanez's statements to investigators were broadly consistent with testimony he gave on the stand, though prosecutors tried to show discrepancies.
Yanez, 29, is heard telling a supervisor that he didn't know where Castile's gun was, then saying that he told Castile to get his hand off it. Yanez testified, "What I meant by that was I didn't know where the gun was up until I saw it in his right thigh area".
Yanez replies: 'Don't reach for it then, don't pull it out'. "Due to the combination of illegal drugs and the gun Mr. Scott had in his possession, officers chose to take enforcement action for public safety concerns", the police department said in an incident summary. "Those are the things in Officer Yanez's head", Gray said, according to The New York Times.
Yanez, who is Latino, also suspected that Castile might have been involved in recent armed robbery.
NELSON: That's among the hours of video and audio recordings released yesterday, along with a 2,100-page report. It shows a wide view of the traffic stop and shooting.
As is usual for traffic stops, Yanez said he went to ask for proof of insurance and a license.
After the shooting, Diamond Reynolds and her four-year-old daughter were put in a squad vehicle.
The evidence from the trial of Officer Jeronimo Yanez is expected to be released Tuesday.
Several days after the justice system in Minnesota acquitted a police officer who shot and killed a black driver who was pulled over for a broken taillight, the state's authorities published the footage of the minutes before the shooting that enraged the black community in the US.
Castile, a 32-year-old elementary school cafeteria worker, had a permit to carry the weapon.
The shooting gained widespread attention because Castile's girlfriend livestreamed its aftermath on Facebook.