blue wall of silence
         n 1: the secrecy of police officers who lie or look the other
               way to protect other police officers; "the blue wall
               cracked when some officers refused to take part in the
               cover-up" [syn: {blue wall of silence}, {blue wall}, {wall
               of silence}]

English Dictionary: blue wall of silence	by the DICT Development Group
From U.S. Gazetteer (1990) [gazetteer]:
Blue Hill Falls, ME       Zip code(s): 04615