Posted: Feb 03, 2017 5:04 pm
DougC wrote:
Maren Margrethe Thomsen
known as Maren Margrethe "Grethe" Bartram and "Thora"
(23 February 1924 – 31 January 2017)
Danish woman who informed on at least 53 people from the Danish resistance movement during the Second World War, resulting in the early communist resistance groups being dismantled and many of their members being sent to Nazi concentration camps. Bartram informed on her brother, husband and close acquaintances.
Wiki
There was a Dutch Jewess Ans van Dijk who did exactly the same (700 in this case) but she did not see 1950. I am surprised she was allowed to live.