Lets say Red John is dead. Lets say he was Macalister.
I know it pains me too...
The show never mentioned Visualize after ep 8.
They are saving it for this year.
Lisbon even hinted at his return if you remember that..

Visualize had tons of cops on the payroll.
Visualize is CONNECTED WITH THE BA.
Thats how Styles knew where Freye was.
Thats how Styles always knew Red John stuff.
This is how Styles knew the Fbi was coming down on him.
And that is why Styles faked his death to evade them.
Styles might be Janes dad and used Macalister to torture Jane.
Or maybe Styles is just a high up Ba member.