Thank you Frank, aka "manhattan", for this video from the past.
Before the merger of the NYPD, I remember the Transit Police referred to as the "Ta Ta" Police. The Housing Police was referred to as the "Ha Ha" Police. Although the reality was that those Transit Police and Housing Police had some of the Most Dangerous Jobs in the Country.
I have a book written by a NYC Housing Police Officer which tells the story in his own words of what it was like to patrol the dangerous public housing projects throughout NYC.
There is a book written by a retired NYC Transit Police Officer titled: "Proud to have been a NYC Transit Cop", written November, 2010.