A 5-year veteran NYPD officer from Long Island was convicted of 2 counts of perjury Thursday for lying to make an illegal 2007 search he was involved in as a rookie appear to be legal.

Michael Carsey, 31, of Garden City, faces up to 7 years in prison for perjury and offering a false instrument following the conviction in Manhattan Supreme Court. His sentencing is scheduled for May 3.

Assigned to street patrol in a high-crime northern Manhattan neighborhood, Carsey and a sergeant supervising him claimed falsely under oath that an individual they stopped on the street had admitted having drugs and guns in his apartment. They were accused of lying both in an affidavit to get the warrant and at a hearing on a motion to suppress the evidence.

The sergeant, William Eiseman, pleaded guilty last year to charges that included directing subordinates to file false paperwork. Charges based on two guns, cocaine and $40,000 found in the apartment of Antoine Melville were dismissed, and Melville testified against Carsey.

Richard Murray, Carsey's lawyer, said Thursday that his client was "collateral damage" in an investigation of the sergeant, and that he planned to appeal.

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"We're very upset with the verdict," Murray said. "It's a case of an innocent person being convicted. . . . I am appalled that the DA prosecuted and I'm shocked by the jury's verdict."

Murray said that at the time of the incident, Carsey was only five weeks out of the police academy, working under the sergeant on an Impact Response Team. The lawyer said he'll lose his job as a result of the conviction, but the NYPD did not respond to a question about Carsey's job status.

District Attorney Cyrus Vance, in a statement, lauded the verdict.

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"Police officers take an oath to protect and serve, and have a responsibility to uphold the highest standards of their profession," Vance said. "Failure to do so risks damaging the reputation of their peers and violating the public's trust."