 They incurred further risk by sending in radio parts for hidden receivers until the Japanese crackdown following Operation Jaywick.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.