Father convicted unjustly!! Help! ?

My father has since 3 years been put in a mental health prison since he's been labelled mentally not well after threating his neighbor with life for some property conflicts they had. We've tried to get him out but even in court we were given the :' he has a secret diagnosis we can't reveal'-justification meanwhile this 'secret diagnosis' is keeping him locked up and forcing him to take pills that might affect his sanity. How in the world can he be prescribed a treatment  if the diagnosis is unknown/secret? Aren't they under a legal obligation to atleast in court make public the condition so we can properly evaluate the conviction? Isn't my dad's life worth and aren't they making him decapaciteted? Who's to take responsability for my father's inability to provide for himself during this period? Our state doesn't offer any sort of assistance after hell get released! I feel so insignificant!! Where can I direct myself if where I live it's considered a 3rd world country looking forward to join eu?