Amazing set of photos of NYPD 1978-81 by Jill Freeman here:

http://www.higherpictures.com/Exhibition.aspx?c=44

Super Cops comic from 1974. Apparently only one issue was ever printed by Red Circle, then also responsible for Archie. A single story from the comic, "2 to Get Ready and 4 to Go," is reprinted here:

http://drmonkeyretroblog.blogspot.com/2010/12/have-super-cop-christmas.html