Escape from a psychiatric hospital

How many healthy people, went crazy hitting in a psychiatric hospital? Alas, the statistics are not confirming, and maybe this is what happened to the former patient, a successful businessman whose riddle you have to solve. How to recognize the face, between the reality and delirium generated by the inflamed brain? When did the previous resident of the ward go crazy, before or after he got into it? And how could he escape, of course, if indeed he could...