I just want to bring you in the mindset of William Blake, by quoting some poems of his artwork. Hope this will give us some clues to the Red John story.
The Tigers of wrath are wiser than the horses of instruction.
You cannot have liberty in this world withoug what you call moral virtue, and you cannot have moral virtue without the slavery of that half of the human race who hate what you call moral virtue.
Both read the Bible day an night, but thou read black where I read white.
Do what you will, this world's fiction and is made up of contradiction.
I must create a system or be enslaved by another mans; I will not reason and compare: my business is to create.
Without contraries is no progression. Attraction and repulsion, reason and energy, love and hate, are necessary to human existence.
Opposition is true friendship.
Active Evil is better than passive Good.
cheers, hope that brings some new thoughts!