Why is the CIA Teaching the NY Police Department?

Defenseone.com:  “Between 2002 and 2012 the CIA sent four agents to help the NYPD’s counterterrorism unit (which is led by a former agency official) . . . . A recent report by the CIA’s inspector general shows that such cooperation can easily go wrong. . . . We should be concerned that CIA involvement with local police will influence them to adopt a counterinsurgency mentality that is simply not warranted on home turf.”