Detective Investigation Files - Season 3 Episode 17

YI, SA and LUNG visit MONG but MONG cannot recall anything. CHIT introduces TUNG to help KWAN in her shop. TIN's friend KIN comes to avenge TIN's being hurt. KWAN calls the police. In order to settle the case, TIN gives money to KWAN and the workers as compensation. HUNG's daughter YEE is murdered. YUNG and YI investigate the case. Beside YEE's corpse, TIN finds some hair and a hat. He recalls that the situation is similar to YING's case. He tells YUNG. YUNG continues his investigation. SA and MONG are hypnotized. MONG recalls that SA was asked to lock the door. They conclude that YING knew the murderer. SA's uncle LEUNG had filthy relationship with YING. YI finds LEUNG before YING's tomb. LEUNG claims that he is not the killer. SA goes to find her grandmother and comes across CHU. CHU tells her that they were neighbors and SA frequently visited him.