Furthermore, in a deliberate attempt to deflect suspicion from herself, Hung Hsiao-hui sent some e-mails in Hsu Chia-chen's name on the morning of 7 March, after she had killed Hsu. But this in fact provided a key clue which helped solve the case, because the investigating prosecutors determined that they had been sent after Hsu's death, and an eyewitness saw Hung using a university computer on the morning of 7 March.
另一方面，洪曉慧為了故布疑陣，在七日早上殺害許嘉真之後，利用許嘉真的名義發電子信件，結果反而成為破案關鍵，因為檢方判斷發信時間許嘉真已經死亡，有目擊者指出洪曉慧七日上午曾使用學校電腦。