Wang admitted to military investigators during initial questioning that six months earlier, acting alone, he had lowered himself down from the rooftop into his neighbors 'apartment looking for money. When Wu Ming-han heard noises and woke up, Wang panicked and hacked both Wu and his wife to death with a meat cleaver. Wang then stole NT $ 6,000 before returning to his own apartment.
根據軍檢的最初偵查筆錄，王文孝坦承在六個月前，獨自由四樓頂樓加蓋部分侵入被害人家中，由於屋主吳銘漢驚醒，王文孝一時心慌，即以菜刀亂砍吳銘漢及其妻葉盈蘭二人直至倒地，在尋獲六千元後，王文孝隨即返回隔壁住處。