I think Red John is Dr Roysten Daniel's: Forgot about him until the suspects list on the website.
Reason 1.
His name Roysten if you - sten it = ROY!
Reason 2.
His last name is Daniels it certain countries they have a drink called Jack Daniels and Jack can be another name for John. This may not be anything.
Reason 3. He's a hypnotist and he reads people like Jane.
Reason 4 . Roysten Daniel's = Red
Thoughts?