"How could RJ have known all the people on the list?", asks Lisbon. It's a trick, Jane replies. And Jane is right and the only way such a trick could work is if Lorelai is actually still alive. RJ is Lorelai - Kirkland is an associate of RJ/Lorelai who was able to use his Homeland Security team to break into Jane's office. Easy enough to dress up a body that looks like Lorelai, considering how ornate RJ kills.