While watching TV, I noticed an Altima as a NYPD patrol car. Couldn't tell if it was a NAH but it likely was given NYPD - Press Release: Commissioner Introduces Hybrid Cars. Yeah yeah, I'm almost 4 years too late and the NAH is now discontinued. I guess they're still probably running around as cop cars there. While digging around at at nyc.gov, I found NYPD Press Release - NYPD INTRODUCES FORD HYBRID CARS TO PATROL FLEET as well. I last went to NYC in 2010 and didn't notice any NAHs as cop cars but definitely saw them as taxis.
All the Altima patrol cars are Hybrid. Also using Ford fusion hydrid as patrol cars marked and unmarked. NYPD has chev, ford, chrysler non hybrid cars as well.