I'm still going to go with Micheal Kirkland
1. His mother committed suicide by slicing herself with a razor. Hmmmm that's RJ's MO. He like to kill women by cutting them.
2. Micheal could have felt abandon by his mother leaving him with his abusive father by committing suicide which would probably give him a hatred of women in general which would explain why Red John targets women and only kills men out of necessity.
3. Micheal is neither confirmed dead or alive.
4. If this spoiler about the dots on Red John's shoulder are true and i'm not saying it is, then it could be a mark that is put on identical twins to tell them apart.
