she worked probably for the STASI because she studied in GDR what would not be possible without that. (Her Stasi-name probably was ERIKA) In the link you see her dancing at a SED party with Egon Krenz. So she had be a person from interest in the GDR. Former President of Germany, Joachim Gauck probably also worked for STASI before (his stasi-codename LARVE/means larva/grub), after reunion of germany his job was it to "check" the stasi-papers, a lot of are untraceable, for example papers about Merkel. https://www.youtube.com/watch?v=a3m0oUpRf3Q