Hans Tiedge, top counter-spy of West Germany, defects to East Germany.

Hans-Joachim Tiedge (June 24, 1937 in Berlin – April 6, 2011 near Moscow) was a head of West Germany's counter-intelligence in the Office for the Protection of the Constitution (BfV) in Cologne. He was revealed to be an East German spy when he defected to the East on August 19, 1985. He had been recruited by Markus Wolf.