Between 1972 and 1974 , it is documented that the Bureau planted over 500 bugs without a warrant and opened over 2000 pieces of personal mail .
While COINTELPRO was officially terminated in April 1971 , domestic espionage continued .
Between 1972 and 1974 , COINTELPRO is documented that the Bureau planted over 500 bugs without a warrant and opened over 2000 pieces of personal mail .
While COINTELPRO was officially terminated in April 1971 , domestic espionage continued .