He headed the special commission responsible for the search and arrest of the White Rose, part of the German Resistance to Nazism.
Robert Mohr was born in Bisterschied in the Palatinate in 1897 into the family of a Palatine-born master mason, one of six brothers and three sisters.
He served in the German Army during the First World War and was awarded the Iron Cross Second Class before resigning in May 1919.
Between 18 and 20 February 1943, Mohr interrogated Sophie Scholl and obtained her confession to the distribution of leaflets for the White Rose movement.
After completion of the investigation into the White Rose, Mohr became chief of the Gestapo office in Mulhouse, occupied Alsace.