Riverside, CA (CBS L.A.) -- Police are on a manhunt Thursday morning after an ex-cop wanted in a double homicide, killed a Riverside police officer and injured another.
Police named Christopher Dorner, a former Los Angeles Police Department officer, a suspect Wednesday in a double homicide in Irvine.
Authorities believe that Dorner was targeting the daughter of Randy Quan, a retired LAPD officer who acted as Dorner's attorney at a 2008 hearing that accused him of making false statements against another officer. Dorner denied the charge but was ultimately fired from the department.
Police said Dorner murdered Quan's 28-year-old daughter, Monica, and her fiancé Sunday to retaliate. He implicated himself in the murders in a long, rambling, often angry 20-page manifesto on Facebook. He wrote, "I never had the opportunity to have a family of my own, I'm terminating yours."
In the rambling manifesto, Dorner said his life ended when police fired him and it ended "again" when the Navy let him go this month.
Police who received a call at 9:10 p.m. Sunday about a person slumped over in a parked car at 2100 Scholarship. Authorities found the recently engaged couple dead in Lawrence's Kia, which was parked at the top of the five-story structure for the building where they lived.
Dorner is described as 6 feet tall, 270 pounds and "likely armed and dangerous." His last known address was in La Palma. Dorner is believed to be in a Nissan Titan license plate 7X03191.
Wednesday the LAPD issued a statement that read in part "The Los Angeles Police Department is working in coordination with the Irvine Police Department regarding the investigation related to Christopher Jordan Dorner ... The Department has learned that Christopher Dorner has made threats against members of the LAPD and we are taking those threats very seriously as we do all threats against our personnel and the public."
They added, "The only information that the Department will confirm regarding Dorner's previous employment is that he was employed as a police officer from February 7, 2002 until September 4, 2008 when his employment with the Department terminated."