question: my dad had brain suger and now is does not sleep at night and and that he hear people talk that they are go to kill him and last night he what out like roundo 4 in morrining and a cop bring hime home and they saide that he was did not now who he was and ware he was and he hears people talk from in side the house and he sleep in the day time but not at night now he whats to buy a gun and is walk with a nife at night what is wong with him