Killer of officer named:

A man who shot and killed a rookie police officer in Northern California before taking his own life during a standoff with police was a 48-year-old convict who had been ordered to surrender a semi-automatic rifle.

Kevin Douglas Limbaugh’s name was released Saturday as authorities continued to investigate his motive for the attack.

The Sacramento Bee reports that court documents show Limbaugh was charged and convicted in a battery case last fall, and he agreed in November to surrender the weapon.

The case stemmed from Limbaugh getting arrested in September for assaulting someone at Cache Creek Casino, Yolo County Sheriff’s Sgt Matthew Davis said.

Authorities have not determined where Limbaugh obtained the two semi-automatic handguns he was believed to have used in the Thursday night attack that killed 22-year-old Officer Natalie Corona in the college town of Davis. (AP)