Christopher Jordan Dorner, Monica Quan and Keith Lawrence Murder Suspect, Wanted 'Revenge' [PHOTOS]: Manhunt for Former LAPD Officer Underway

Several reports confirm that police are now on the manhunt for former LAPD officer Christopher Jordan Dorner, the man suspected of murdering Cal State Fullerton basketball coach Monica Quan and her fiancé Keith Lawrence on Sunday, Feb. 3. Dorner is also suspected of shooting three police officers early Thursday morning (Feb. 7), one fatally. According to the Daily Mail, Dorner killed these intended victims "after vowing to take revenge for being fired [from the police dept.] in a crazed online manifesto." Police believe that Dorner is still currently armed and dangerous.

Irvine police Chief David L. Maggard announced during a Wednesday night news conference that 33-year-old Dorner, also a former U.S. Navy Reservist, is the main suspect in the violent shootings of Quan (28) and Lawrence (27). The couple was found dead of multiple gunshot wounds in their car parked near their condominium in Irvine, Orange County on Sunday night. Quan was an assistant women's basketball coach at Cal State Fullerton and Lawrence was a public safety officer at the University of Southern California. The murders shocked and disheartened the community.

Dorner is also suspected of shooting three police officers early Thursday morning after the cops tried to apprehend him for the killings. One police officer died during the failed attempt to arrest Dorner.

Maggard explains that Dorner was dismissed from the LAPD back in 2009. He went on to implicate himself in the Quan/Lawrence killings with a multi-page online manifesto he wrote that was later obtained by police. Dorner laid out his murderous plans in the online message board, threatening more violence against the prestigious LA family who he believes got him fired. Dorner allegedly blames Quan's father, Capt. Randy Quan, for getting him fired from police department. At one point in his disturbing online message, Dorner wrote, "I never had the opportunity to have a family of my own ... (so) I am terminating yours."

Maggard released few details on the manifesto or its contents.

UPDATE: Christopher Dorner Manifesto, Facebook [FULL TRANSCRIPT]: Murderous, Vengeful Ex-LAPD Officer Leads Cops on Massive Manhunt

Police are now on a massive manhunt for Dorner, whose whereabouts are still unknown. Authorities are seeking the public's help in finding him. Dorner may be driving a blue 2005 Nissan Titan pickup truck - his last known address was in La Palma in northern Orange County near Fullerton. According to Maggard, "We have strong cause to believe Dorner is armed and dangerous." The LAPD and FBI are also assisting in the case.

Dorner was with the LAPD from 2005 until 2008, when he was fired for making false statements. LAPD Captain William Hayes told the AP Wednesday evening that Capt. Randy Quan (who later became a lawyer in retirement) represented Dorner in front of the Board of Rights, a tribunal that ultimately ruled against Dorner at the time of his dismissal.