Gertrud Stockhausen suffered from depression during her marriage, attempted suicide and was hospitalised in a mental institution. On May 27 1941 she was taken with 89 other patients to the killing centre Hadamar, in Hesse-Nassau.
Early next month, a memorial plaque will be set into the ground outside the house where the Stockhausen family lived in Bärbroich.
Here’s an informative press release (auf Deutsch). Much of the research into Gertrud’s life and death was conducted by a schoolgirl, Lisa Quernes from the Landesmusikgymnasium in Montabaur