The Jewish student David Koker (27 November 1921 - 23 February 1945) lived with his family in Amsterdam until he was captured on the night of 11 February 1943 and transported to camp Vught.David was forced to halt his studies in Philosophy and History in September 1941 when the university ceased allowing Jews to study anymore. The family did not go into hiding because they had received a sperre (exemption) and believed they were safe.