In his second interrogation session with the police, Wang further confessed that his younger brother Wang Wen-chung had stood lookout while he and three accomplices killed the couple. He only identified the other three as Hsieh Ching-hui, Blackie, and Black Boy, names that he is suspected of making up on the spot.
王文孝被捕後，在警方二次偵訊後供出擔任把風的其弟王文忠及後來疑似虛構的謝廣惠、黑點、黑仔等共犯人名。