It was unfortunate of Senior Lieutenant Adachi that he was alone in the middle of the night, but at the same time, it was pointed out that a structural flaw of the 2-axle passenger car was a contributing factor to the background of the crime.
深夜、足立大尉が一人でいたことが不運であったが、事件の背景に乗車していた二軸客車の構造的欠陥があったと指摘された。