The New York City Police Department has admitted its elaborate CIA-aided efforts to spy on Muslim neighborhoods over a period of more than six years through a secret police unit failed to yield a terrorism investigation or even a single lead. The NYPD spy program included efforts to infiltrate Muslim student groups, send informants into mosques, eavesdrop on conversations and create databases showing where Muslims lived, worked and prayed. The Associated Press won a Pulitzer Prize for its series revealing how the NYPD conducted widespread spying on Muslim Americans throughout the eastern United States without evidence of wrongdoing. The AP now reports court records unsealed Monday show information collected by the NYPD’s secret Demographics Unit did not spark a single investigation.