Christopher Dorner, 33, has been on the run for the past week, following the attacks in southern California.
Announcing the reward, Los Angeles Mayor Antonio Villaraigosa said his “reign of terror” must end.
In an online manifesto, Christopher Dorner swore to take revenge on police officers he blamed for his firing in 2008.
“We will not tolerate anyone undermining the security, the tranquility of our neighborhoods,” Antonio Villaraigosa said at a news conference announcing the reward on Sunday.
“We will not tolerate this reign of terror that has robbed us of the peace of mind that residents of southern California deserve,” he added.
Christopher Dorner, a former officer of the LAPD, is suspected of killing three people, including the daughter of a retired captain who represented him in a disciplinary procedure.
Police are now protecting 50 families, many belonging to former LAPD colleagues, against whom Christopher Dorner has vowed revenge for ruining his career.
In his online manifesto, Christopher Dorner suggested that some were motivated by racism.
Police are combing an area near Big Bear Lake, 80 miles east of Los Angeles, after finding the suspect’s burned-out truck near a ski area.
Christopher Dorner is suspected of:
A former US Navy reservist, Christopher Dorner lost his job for making false statements.
According to court documents, Christopher Dorner was fired in 2008 after making a complaint against his field training officer, saying she had kicked a suspect, a schizophrenic man with severe dementia, during an arrest.
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