Evans had been accused by her then-partner on the force, Christopher Dorner, of kicking a mentally ill man. When that claim was found to be untrue, the department stripped Dorner of his badge.
His subsequent rage led to a homicidal rampage across Southern California in 2013 that Evans helped to end by identifying him to authorities.
In the standoff that followed an extensive manhunt, Dorner shot himself and died.
Now, two years after the rampage, Evans, who is white, has sued the LAPD, alleging that her supervisors retaliated and discriminated against her because of the "racial connotations" in the accusations by Dorner, who was black.
LAPD officials and Evans' attorneys declined to comment on the lawsuit, which was filed in Los Angeles County Superior Court on Friday.
In his weeklong shooting spree across Southern California, Dorner killed two police officers and the daughter of an LAPD captain and her boyfriend.
In a manifesto written on his Facebook page, Dorner said that he was discriminated against because of his race and unfairly fired from the department, and that he sought retribution against those who wronged him.
Dorner was fired in 2009 after a department disciplinary board concluded that he had made false statements against Evans, who was his training officer.
According to the lawsuit, Dorner's complaint sparked "racial tension" and led to Evans being harassed by her supervisors, blocked from promotion and denied overtime pay.
The lawsuit alleges that Evans was targeted by the department and faced further retaliation for reporting racial discrimination against her by supervisors.
Evans, the lawsuit says, was made "a scapegoat because of the racial connotations attached to Dorner's claims and was punished by the LAPD, and treated unfairly by members of the department on account of her race." Read More: