Board Thread:General Discussion/@comment-4856748-20140810153003/@comment-1159766-20140814224419

Okay, I've deduced it down to two possible suspects, either The Councilor or Malcolm Hargrove, the chairman of the oversight sub committee. Think about it, Hargrove was already getting involved with finding Freelancer technology when he sent Washington to find Epsilon, so why wouldn't he then use former UNSC soldiers to do work for the UNSC.

Then with the Councilor, he was in direct contact with the Director and the other Freelancers, though I never saw him as a character who could be a central antagonist.