In 6x08 promo Jane was chasing a man very similar to Macallister, and meet someone in church whose sound is very similar to Bob\Michael Kirkland, so here is my theory about what is going on there.
I think Macallister survived from the blast, he must be because he stands against the wall, and everyone in this side survived.Jane Bertram Smith survived the blast very healtly, so he couldnt be dead. He and Stiles\Haffner escaped.No one dead.
Macallister knows Bertam'll go after him as he went after Reede Smith which i dont understand why. So he left the flashdisc in the storage he knew the team will find it.
While Bertam came to the storage the woman called him ''Thomas'' and storage was full of wines (Napa Walley).
He gave a message to PJ(by the flashdisc)  to meet him in the church, and tell him something important.
Rj has an eye on Patrick all the time, and he found out they're gonna meet. And try to stop Macallister,it was RJ whom was chasing Macallister. And killed him before he meet PJ, and go there by himself because there is no one left in that list and PJ announced Bertam already to the public. So RJ thinks he won.
But PJ has a different plan as always and has been playing his own game since the beginning and waits for the moment he reveals himself holding the trophy..
It could be anybody dead in the list..Each one of them has a strong stories\ theories behind. But i'im going with the Kirkland because the sound of RJ is very similar to Kirklands.
But I'll be more happy if Ray Haffner is RJ. He is the one whom I think RJ uis ntil this time..