STASI
| Date | Clue |
|---|---|
| 2017-04-23 | East German secret police |
| 2015-11-15 | East German secret police |
| 2013-09-22 | East German secret police |
| 2007-09-16 | East German secret police |
| 2006-09-17 | East German secret police |
| 2001-09-09 | East German secret police |
| 2001-03-29 | Former East German secret police |
| 1999-11-26 | East German secret police |
| 1999-01-14 | Former East German secret police |
| 1997-12-28 | East German secret police |
| 1996-10-26 | Former East German secret police |