The movie gets more annoying as it progress but so many plot holes with low IQ police personnel and considering the gravity of the crime discovered by the deaf mute daughter and mother but no urgency shown by the police except the policeman whose sister was missing. How the other police personnel just let the suspect walk out of the police station is stupidly mind boggling considering that daughter n mother can verify that the suspect is the one that attack the policeman, Secondly walking away from apprehension of the serial killer in exchange of the deaf girl for policeman's sister is mind boggling!
I understand that the film need to make suspense to keep the viewer but either you make the killer so smart but don't make the policeman look so stupid walking away to save his sister blindly by giving the deaf girl to the killer knowing how sick he is and with no guarantee to the sister whereabout or whetehr dead or alive!
Lastly the actress playing the deaf girl and deaf mother are good but overall it's disappointing with so many gaping holes in the story and imho really cheap and lazy effort by the film maker in antagonizing viewer with the main bulk of the time with deliberate cat and mouse scenario.