오대양 사건 당시 현장에 있던 생존자 가운데 유일하게 구원파 신자가 아니어서 객관적인 증언이 기대됐던 최후 목격자 할머니가 행방불명된 것이다.
The last witness grandmother, the only survivor on the scene at the time of Odayang Incident, who was not a salvationist and was expected to testify, was missing.