After the fall of the Wall, criminal investigations into border killings were launched by the Investigating Agency for Governmental and Party Crimes (ZERV) and the Berlin public prosecutor's office.[4] Each of these institutions used different criteria to count deaths. In 2000, the ZERV compared data from the central registration office in Salzgitter with findings in GDR archives and made a total of 122 cases of targeted killing by GDR state organs at the border to West-Berlin.