During the subsequent Double Tenth Incident, an informant told the Kempeitai (Japanese military police) that the Choys were involved in smuggling money into Changi Prison, resulting in the arrest of Choy's husband. After several days, Choy went to the Kempeitai East District Branch to ask about her husband. The Japanese denied knowledge of him, but lured her back to the branch three weeks later and confined her with other prisoners. She was imprisoned and subjected to torture. R. H. Scott, a former Director of the British Ministry of Information (Far Eastern Branch) and principal witness at the War Crimes Court in Singapore, later testified that he saw Choy being stripped and severely beaten "on at least one occasion".