This is 26th. Has he woke up? I understand he needs emergency treatment. It is quite urgent. one cannot get immediate response through the internet.In such cases one must rush the patient to hospital or if possible call the doctor at home.
If he's still hasn't woken up then what are you waiting for,take ur father to a doctor or call ambulance imediately..this is a serious thing..it can be a case of med overdose..
try to pinch him with a pin in the middle of the feet..dont pressurise it ,just a force of pinch,thats all..