I know a lot of people won't like this theory but even if Kirkland isn't red john I think he pretended to be in one episode when we seen the reflection on the computer for Dr. Joe n.h it is his face and you can tell by the way he blinks some people have a faster more distinctive blink and if you watch it then watch no. Kirkland scenes the face is the same and the blinking is the same so I'm not saying he is red john but maybe he was trying to help Patrick without exposing himself because he was getting all the info Patrick had so why not let him follow the leads and he would have access to the doj system.