Lyssa Nicole, who trained Corona at the police academy, said the officer loved helping people and protecting people.
The gunman sprayed bullets at a firetruck, a passing bus and a house, pausing to reload.
Corona was the second officer killed in California in the past two and a half weeks.
Shaun Kingston, 39, saw the gunman shoot at the firetruck, "dump a clip and put another one in", and begin calmly walking away until Kingston, who followed at a distance, lost him in the crowd.
Her father, Merced Coronoa, is a retired 26-year veteran deputy with the Colusa County Sheriff's Office, who is is now a county supervisor. Ronil Singh of the Newman Police Department was shot to death on December 26, during a DUI stop.
Her family says she was heavily involved in her church and would do anything for anyone.
Corona wore her love for the police on her sleeve, as evidenced by her Facebook profile picture showing her posing in a floor-length blue gown while holding an American flag with a blue line honoring law enforcement.
On Jan. 5, a police officer in Utah was shot dead while trying to arrest a risky fugitive.
A California police officer who had only been on the job a few weeks has died after being shot by a suspect who later turned the gun on himself. She was shot in the neck and then several other times as she lay on the ground.
At one point during the manhunt, a witness alerted police to a backpack the gunman had dropped near the shooting scene, which enabled authorities to learn the suspect's name and where he lived.
A Northern California rookie policewoman who was shot and killed is being remembered as "the cop that any community would want". He said of the 22-year-old woman that "everybody who met her liked her".
Our sister station CBS13 in Sacramento says a female officer was shot, according to Davis Police.
Officials announced early Friday he had been found dead inside. Investigators believe she was ambushed by a gunman on a bicycle, but they haven't a determined the motive for his actions.
In wake of recent officers killed in the line of duty, Action News Now reporter Christina Vitale spoke with the Chico Police Department about their precautions when going out on calls.
"It really touched her with a lot of the police murders that were done", said cousin Emily Gomez said.
The University of California, Davis, is warning residents to shelter in place after an officer-involved shooting broke out on Thursday evening. Despite the valiant efforts of paramedics who rushed her to the hospital, and UC Davis Medical Center personnel, she succumbed to her injuries. He has not been identified.
The Fairfield Police Department sent 16 officers: five from patrol, three K-9 officers and their dogs, and the department's Special Operations Team, Capt. Rob Lenke reports.