31 March 1998,
They discovered that the Spanish police spy on the seat of the Local Union of Vitoria. The operator who went to repair a phone failure realized that the cables were punctured and to the upper floor. While they were in it, on the upper floor people started to hear nervously, and those outside saw gi go out with sports bags. The task investigative journalism exploded the political scandal, publishing the names and surnames of CESID spies or informing them that they were spied from their front house.
Source:
Egin (1 April 1998).