After the war , the PWIS became known as the War Crimes Investigation Unit ( WCIU ) , and the London Cage became the headquarters for questioning suspected war criminals . Among the German war criminals confined at the London cage was Fritz Knoechlein , who was in charge of the murder of 97 British prisoners who had surrendered at Le Paradis , France , in May 1940 . Knoechlein was convicted and hanged in 1949 . < ! -- Commented out : Alexander Scotland participated in the interrogation of Gen. Kurt Meyer , who was accused of participating in a massacre of Canadian troops . Meyer was eventually sentenced to death , although the sentence was not carried out . Scotland observed that Meyer received milder treatment after news of the atrocity had grown " cold "
murder of 97 British prisoners
Le Paradis massacre
London Cage