When Kirkland asked Jason Lennon, "Do you recognize me," he found out his twin had altered his appearance. Michael Kirkland was "corrupted" by RJ when he BECAME RJ when he was part of Visualize. Now, he looks like someone else, and has a new name. That someone is one of the dead suspects from the explosion. I'm betting it's McAllister. He faked his death by placing Robert Kirkland's body under or in the house, with the bomb, so "his" DNA would be found among the dead.
I think he goes to the church intending to gloat, then kill PJ, knowing Bertram is on the hook for being RJ. Somehow, that doesn't work out in the church.