After the murder, Chu took out the can of petrol he bought earlier, and poured it around the apartment and set it on fire. While escaping, Chu encounted Wang Zi-Xiang's son of age four, named Wong Shiu-young. Zhu grabbed the young Wong and threw him out from the 4th floor apartment, resulting in heavy injury for the boy. Despite the fact that a crowd had gathered, Wong wasn't stopped by the crowd due to believing he was merely escaping the fire.