A cop killer is a person who kills a police officer.
Cop killer or Cop Killer may also refer to:
"Cop Killer" (song), a 1992 song by American heavy metal band Body Count "Cop Killer", a 2011 song by American singer-songwriter John Maus Cop Killer (novel), a novel by Sjöwall and Wahlöö Copkiller, a 1983 Italian film starring Harvey Keitel Cop Killer, a 1988 television film starring Joseph Bottoms "Cop Killer" (CSI: Miami), an episode of CSI: Miami "The Cop-Killer" (short story), a 1951 Nero Wolfe novella by Rex Stout The Police Murderer (Polismördaren), a 1994 Swedish film Cop killer bullets, a name sometimes given to Teflon-coated bullets
See also Cop Killa, alternate name for the Vertebreaker piledriver, a professional wrestling driver move