Who is Red John?

Theories of Guest57 (1)

Does anyone have a tangible explanation for Red John knowing the list of 7 suspects (see season 5 finale) ? 
Do I have to abandon the hope of being provided with some (any?) explanation on Red John's actions (either with the TV show or the various contributors of this website) ?

Argue on this theory or rate it.
plausible
unlikely
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