I know this theory is crazy and most of you will look away and think I'm an idiot. But I believe Red John is Danny Ruskin, PJ's brother-in-law. Those of you who believe that he would never kill his sister and her daughter, think about this. Danny was furious with PJ for running away with his sister - he sure could've been furious with her as well. His voice is very Red John like. Maybe I'm dumb, maybe this is just a silly theory, but there is a small chance it's him.
