An NYPD officer who was a key witness at the federal trial that led to court-ordered stop-and-frisk reforms has now filed a federal lawsuit against New York City claiming that he has faced retaliation for speaking out.

Officer Adhyl Polanco, who also complained to the media about how stop and frisk and an alleged NYPD quota system for summonses and arrests adversely affected minorities, said in his Brooklyn federal court suit that his locker was plastered with photos of PBA president Pat Lynch.

He said he was called names by other officers, hit with suspensions and reprimands and denied promotions as a result of speaking out.

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Responding to the suit, city law department spokesman Nick Paolucci said, "We'll evaluate the merits of each claim once we are served."

Polanco was also one of the plaintiffs in a new class action lawsuit filed in federal court in Manhattan this week, claiming minority officers are discriminated against by an alleged quota system that targets minority communities, because they are unwilling to enforce it.