The NYPD says a report by the state attorney general's office on the NYPD's stop and frisk tactic is flawed.
The report analyzed about 150,000 arrests from about 2.4 million street stops from 2009 to 2012.
It found about half of the arrests resulted in convictions or guilty pleas.
The other half were never prosecuted or were dismissed, or charges were adjourned in contemplation of dismissal.
NYPD spokesman John McCarthy said Thursday police are allowed to stop someone if the officer believes the person has committed a crime or is about to.
He says the analysis ignores situations where the officer's action prevents crime. In those cases, there would be no arrest.
McCarthy also notes the report by Attorney General Eric Schneiderman makes no recommendations.