Didn't you learn jack from Unbreakable.
Not long after he finally kills Red John, Pat is going to stick a gun in his mouth and pull the trigger.
His wife and child are dead.
And Johns beating heart is the only thing stopping him from joining them.
Wouldn't it be kooky if we find out in the last episode that Pat really can see and talk to the dead, and that the whole time his wife has been screaming in incomprehensible pain 5 feet away from him the whole time?