Watch Detective Investigation Files Season 3 Episode 18 Online

TIN remembers that the curtains were hanging on the window when the murder happened. Believing that MONG has lied, YI and YUNG go to question him. MONG does not admit telling lies. HUNG recalls the case and accuses MONG as the murderer. MONG admits he is the killer. YUNG and YI find the case suspicious. Moreover MONG does not like the wanted criminal. They ask CHU. CHU tells them that MONG has a brother ON who is an idiot. They find him and realize that he is the wanted one. ON tells them what he did. MONG also tells the truth.