Earlier this week, an anonymous public defender sent Gothamist this photo of an NYPD warrant squad officer wearing a t-shirt with a pretty disturbing quote from Ernest Hemingway:
queens cop shirt

The Village Voice reports that the quote was also printed on t-shirts worn by NYPD's infamous Street Crimes Unit, which was disbanded after shooting unarmed immigrant Amadou Diallo 41 times in 1999 as Diallo reached for his wallet. The Voice also reports that at least two NYPD police commissioners have used the phrase "hunter of men" to describe police work -- Bernard Kerik and Howard Safir.
There have been a number of other incidents over the years in which cops have donned t-shirts that reflect a mentality somewhat less lofty than "protect and serve." Most recently, a Northern California union for school police officers came under fire for printing up and selling these shirts as a fundraiser:
raisecage