The German constitution set forth that law enforcement is a matter of the states; no federal "general purpose" police may exist. Secret agencies and police may

The German constitution set forth that law enforcement is a matter of the states; no federal "general purpose" police may exist. Secret agencies and police may not be mixed (although some commenters liken the excessive powers of the Bundeskriminalamt to a secret police), for obvious reasons. Many other western countries don't have that separation in the first place; e.g. the FBI is quite clearly a secret police.