In the 11th hour, I am changing my theory. Well, not so much changing my theory as I am accepting other theories as correct as well. I never thought I would end up with this conclusion but at the same time, it's the only thing that makes sense anymore. So here it is....
There are 3 Red John's. Yes, 3. That is why there are 3 dots on the tattoo. I am convinced that Partridge and McAllister are 2 of them but I'm not sure if the third is Bertram or Michael Kirkland. This is why so many of the clues lead us all in different directions. I'm sure only one of them killed Patrick's family and I have no idea which one but I think we are all going to get what we want in the end.
I watched this video of a guy watching an early screening of the show and that is when it all made sense. It is basically, an unholy trinity. I honestly can't believe that I have changed my mind in such a dramatic way, but I have.