Unsound Innocence (2012)

There is a police investigation in a case where mentally challenged young women disappeared in suspicious circumstances. Mike Charlton, a young ambitious detective, gets to interrogate the main suspect, a well-known psychologist doctor. His instinct says solving the case is a piece of cake, but the suspect is either innocent or too smart to get caught. The interrogation turns into a cat and mouse game where the cop has to use up all of his assets from bluffs to lies, from patience to violence until the surprising, shocking and disturbing end.