My opinion is, we will see the unmask Red John end of this series, but probably he won't be arrested or killed.

What do you think about it? Do you agree with me?

(I'am
not sure, but it looks like Brett Partridge is Red John, because the
simplest answer is the most obvious. His style fits perfectly and very
suspicious for me, that he will be back in 5X15 episode. Hmmmm.)