WORLD WAR II > German Intelligence Agents and Suspected AgentsKV 2/36431940 May 25 - 1949 Mar 01
Folkert Arie Van KOUTRIK, alias 'WALBACH': Dutch. Employed by SIS in the Netherlands from 1937 and then in 1940/1941 in the UK by the Security Service, Van KOUTRIK was re-employed by SIS in 1941/1942 at a refugee reception centre in the UK. In 1946 it was discovered from interrogation of German prisoners that he had been 'turned' by the Abwehr in 1938, his codename being WALBACH. His information led to the kidnapping of the SIS officers Stevens and Best at Venlo in 1939