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Ex-cop fugitive Christopher Dorner charged with murder

On day five of the manhunt for Christopher Dorner, who is suspected of killing three people, the Riverside District Attorney filed charges against Dorner including one count of first-degree murder and three counts of attempted murder. The LAPD has assigned officers to protect 50 families the accused cop killer has threatened and a $1 million reward is now being offered for information leading to Dorner's arrest.  NBC's Miguel Almager reports.

Fugitive ex-LAPD officer Christopher Dorner was officially charged Monday afternoon with murdering a Riverside, Calif., police officer — and special circumstances that could result in the death penalty.

Riverside County District Attorney Paul Zellerbach said Dorner has also been charged with the attempted murder of another Riverside police officer and two LAPD officers.

By filing the charges, police now have the right to arrest Dorner on sight, Zellerbach said.

"By both his words and conduct, [Dorner] has made very clear to us that every law enforcement officer in Southern California is in danger of being shot and killed," Zellerbach said at a press conference.

The Riverside officers and LAPD officers were targeted in two different shootings early Thursday after Dorner became the target of a state-wide manhunt.

Police say Dorner, 33, is on a mission to murder former LAPD colleagues and superiors — and their families — as payback for his 2008 firing. They believe he killed a retired captain's daughter and her fiance in Irvine, Calif., last Sunday, before setting his sights on the four cops he shot.

Police have identified the murdered Riverside police officer as Michael Crain, 34, a former U.S. Marine and an 11-year veteran of the Riverside police department. Crain is survived by his wife, his 10-year-old son, and his 4-year-old daughter. Officials have not disclosed the names of the three wounded police officers.

Fugitive ex-cop Christopher Dorner is charged with the murder of a police officer under special circumstances that could bring the death penalty.

Meanwhile, investigators combed through hundreds of tips Monday after offering a $1 million reward on Sunday for information leading to the apprehension, arrest and conviction of Dorner.

"We need the help of the public," Zellerbach said at the press conference, adding that anyone who has relevant information is encouraged to contact police tip lines. "We need all of the public's eyes and ears in assisting law enforcement in apprehending this very dangerous individual."

The LAPD believes Dorner is extremely dangerous and has an arsenal of weapons, including assault rifles.

Dorner served in the LAPD from 2005 to 2008 and was fired for making false statements after he accused a training officer of beating up a man.

During an internal review, Dorner was represented by Randal Quan, a retired police captain. Quan's 28-year-old daughter, Monica, and her fiancé, 27-year-old Keith Lawrence, were shot and killed last week while parking their car at their apartment complex after a Super Bowl party.

Dorner outlined his revenge plot in an 11,400-word manifesto posted online, according to investigators.

Read Dorner's manifesto at NBCLosAngeles.com

"I never had the opportunity to have a family of my own, I’m terminating yours," Dorner writes in the unnerving document.