- Protesters who have been calling for Chicago Mayor Rahm Emanuel's resignation also have another target: a much-criticized, quasi-independent agency that was created to investigate complaints against police officers but has rarely ruled against them.

The mayor's critics complain that his pledge to reform the Independent Police Review Authority is too limited because he seeks to improve an existing system rather than scrapping it and starting over.

In the outrage that erupted over the video showing an officer fatally shooting Laquan McDonald, Emanuel sacked his police chief and set up a task force to recommend changes. He also replaced the head of the authority known as IPRA.

Former IPRA investigator and supervisor Lorenzo Davis said he was fired this year after refusing to reverse his finding in one fatal police shooting that it was not justified.

The idea behind IPRA when it was set up in 2007 was for the agency to be wholly independent of police and the mayor's office as a way to weed out bad officers, but that never actually happened, Davis' lawyer, Torreya Hamilton, said yesterday.

"The goal became to exonerate the police officer and therefore the city," said Hamilton, who represents Davis in a lawsuit he filed against the city over his firing.

Suspicion about reforms initiated by City Hall runs deep in Chicago, especially among blacks, who have heard similar pledges every couple of years, whenever allegations of police brutality arose. Many put more hope in a just-launched federal civil-rights investigation, though that could take years to play out.

In an address to the City Council this week, a sometimes emotional and sometimes tough-talking Emanuel apologized for any mishandling of the McDonald case and repeatedly pledged to improve how IPRA deals with the issue of police misconduct.

"Each time when we confronted it in the past, Chicago only went far enough to clear our consciences so we could move on," he said. "This time will and must be different."

In all, Lorenzo, himself a former Chicago police officer, was told six times to change his findings in favor of officers, according to Hamilton.

"There was never ever a time when they said, 'You want to exonerate an officer, and we think he should be disciplined,"' she said.

An IPRA spokesman declined to comment yesterday.

When it was created, the authority's exact operations were not made precisely clear. Many details were left to politically appointed administrators with law enforcement backgrounds. Since around 2008, when Davis began working there, more than 10,000 excessive-force complaints have resulted in the dismissal of just four officers, he said.

"It was inadequate from the beginning," Davis said Wednesday at a Chicago Urban League forum.

The authority's new head is Sharon Fairley, a recent federal prosecutor. Davis complains that Emanuel sought no feedback from the community before the appointment. He said IPRA should be led by someone not beholden to the established power structures and who can absorb and implement new procedures.

One activist on the Urban League panel, Trina Reynolds, argued that the agency is beyond salvaging, calling it "illegitimate."