In May 1941, Lafrenz moved to
Munich to study, and while there she got to know
Hans Scholl and
Christoph Probst. She attended many talks and discussions of the White Rose group, including those with
Kurt Huber. She and Hans Scholl, one of the group's leaders, were briefly romantically involved in summer 1941. and distributed them with her former classmate Heinz Kucharski. When Hans and
Sophie Scholl were arrested at the
University of Munich on 18 February 1943 for spreading anti-war leaflets, Lafrenz was also put under investigation by the
Gestapo. She was arrested, along with Alexander Schmorell and Kurt Huber, on 15 March. During her interrogation by the Gestapo, Lafrenz succeeded in disguising the full extent of her involvement in the distribution of leaflets. As a result, she was sentenced to one year in prison on 19 April 1943, by the
Volksgerichtshof (People's Court, first senate) for her role as a confidante. After her release, she was arrested and imprisoned once again by the Gestapo. == After the war ==