Ronil Singh, 33, of the Newman Police Department, was shot to death December 26 after he stopped a suspected drunk driver. Corona died at the hospital. While she was at the scene, the gunman rode up on a bicycle, walked up to Corona and began firing, Pytel said.
O'Brien said officers go through extensive training to try and prevent these happenings.
Her suspected killer also was dead hours later.
Reporter Hannah Darden tweeted at about 11:15 p.m. PT that police reportedly had the suspect cornered inside a home.
Governor Gavin Newsom said in a statement that he and his wife are "terribly saddened to learn of the death.Officer Corona was protecting her community from harm when she was tragically shot in the line of duty". "The officer sustained a bullet wound and was rushed to the UC Davis Medical Center".
Merced Corona (left), pins his daughter, Natalie Corona's badge on her during a swearing-in ceremony in the City of Davis on August 2. According to a report in the Williams Pioneer Review, her father, Merced Corona, a veteran of the Colusa County Sheriff's Office, proudly pinned on her badge during the ceremony. She graduated June 23 from the Sacramento Police Academy after receiving an associate degree in administration of justice from Yuba College.More news: CES: HTC Vive Pro Eye
Corona is the second, 22-year-old female police officer killed this week.
He says he didn't believe the shots came from someone in one of the crashed cars.
"I've heard her described by our officers tonight as our daughter, our friend, and just a sister that we all wanted". Police announced that she was shot when responding to a three-car collision outside Sacramento.
"We have a lead at this point, a possible suspect", Doroshov added. Police have not named the suspect, who was found in a house near the shooting, nor determined what prompted the shooting. "We have to reserve some information in order to keep us safe".
They surrounded the corner house and issued commands for the suspect to come out. The shooter, he added, used two semiautomatic pistols - a.45-caliber and 9mm - but it was unknown whether the weapons were registered to him.
"It appears that he pushed a couch in front of the door and shortly after that officers reported hearing a gunshot coming from inside the residence", Pytel said.
She was the first Davis officer killed in the line of duty in six decades.More news: The key issues Meghan Markle wants to champion as a royal
Davis Police Department officials say Officer Natalie Corona was shot after responding to a traffic accident Thursday evening in the community west of Sacramento.
#Breaking SWAT team an K-9 units searching for gunman in Downtown Davis following Officer Involved Shooting.
A UC Davis alert went out to the campus community at 7:47 p.m., warning people to shelter in place, and describing the suspect as a white man in his 20s with average build, wearing a baseball cap, black jacket, blue or tan jeans and black tactical boots.
"The person was behind me and all of a sudden I heard gunshots", Pascual said, noting that he did not believe the gunman to be someone involved in the auto crash. It was also unclear whether the other involved motorists had been questioned.
"She was the best of us", said Davis officer Mike Yu, after placing a "Blue Lives Matter" flag at the crime scene, about a mile from the police station.
"But that was the last time", Doroshov said. "I think everyone holding it together, trying to do their jobs very professionally, but it's hard".
Davis' last officer to die on duty was Douglas Cantrill, who was found inside his patrol vehicle with a gunshot wound to his heart September 7, 1959.More news: Megyn Kelly, NBC News reach separation agreement