On August 21, the task force announced that Yin's murder had been planned out in advance by persons who were currently active in the military service. One was Captain Chen Lu-tseng, chief of staff for former Navy Commander-in-Chief Chuang Ming-yao. Another was a high-ranking military official whose identity is too sensitive to reveal.
八月二十一日，特別調查小組公佈該案突破性進展，確定尹清楓乃是遭海軍現役軍官設局誘殺致死，涉案者除前海軍總司令莊銘耀的隨員室主任陳祿曾上校外，尚有一名身分敏感的將官。