Iris Scanners
http://gothamist.com/2011/05/04/nypds_fingerprint_scanners_may_or_m.php <--- from this gothamist article, it looks like nypd has purchased biometrics from the company morphotrak before. this was about fingerprint scanners.
http://www.findbiometrics.com/company-profiles/MorphoTrak/ <--- interesting morphotrak company profile. they sell iris scan tech and "MorphoTrak's combined U.S. customer base includes over 50% of the law enforcement biometric identification systems at the local, state, and national level, including AFIS programs for the U.S. Department of Defense and the FBI."
pg 18 of the 2010 procurement report has record of contract between NYPD and MorphoTrak, but only mentions fingerprint scans.