The Australian born daughter of Dr. Josef Mengele, has been forewarned by a cousin calling herself, Gabrielle, of her birth mother, whose name is apparently, Valerie. The cousin knowing full well that sooner or later with all the information available. She would be traced.
Better to hear it from a family member than the media.
Now. From sources on the 'Net, it is determined that his daughter is attempting to contact Mengele's family which the majority are located in the Bavarian town of Guenzburg. Where Mengele, himself, was born on March 16, 1911.
She is apparently asking if a DNA test or something along those lines is possible. So as she can know 100%.
She is taking it very well, from what I can surmise from what I have read.