This is Greely's office. Notice that if you look at the papers on his desk for secrets and PLANS they were all written by Greely.
Also if you look at one of the libraries it says how to trick and manipulate friends.
That could mean he was tricking and manipulating you.
But then again it could be he was tricking the phantoms but I highly doubt it.
It obvious that the phantoms trust he and that he may be a phantom, may be PART, phantom, Or he's just on the phantoms side but turned that around by killing him self saving jamaa (he's probably still alive but I appreciate Greely more thinking that he killed himself saving jamaa)