Stasi

To add to the Stasi effect, the tip line offers snitches anonymity.

Regulation expert Dr Maria Luisa Stasi is alleging the tech giant overcharged companies for its Window Server software, used in cloud computing.

Details of the killing remained unknown for decades after the Stasi secret police shredded files relating to the case before communist East Germany reunified with the West in 1991.

Stasi officers gave him an exit visa and some West German money and escorted him to Friedrichstrasse station, which was still served by trains from the western side of the city.

Details of the case were uncovered by historians, who tracked down related files in the Stasi archives.