Code of Law - Season 1 Episode 3 Mr Tay

A former psychologist casually suffocates his wife to death and then calls the police himself. His alibi - a 'friend' called Ah Boy told him to do it. Both the investigators and the defence team realize they may have met their match in a suspect, and client, who can manipulate and hit them where it hurts emotionally. Is Mr Tay really crazy, or is he just faking it to avoid the gallows?