Eventually Sydney learns through FBI Assistant Director Kendall (who is actually the director of the Department of Special Research) that she worked in the employ of the Covenant as a supposedly brainwashed assassin, although she was able to resist their attempts to manipulate her due to her experiences with Project Christmas and report to the CIA during this time. Eventually, she wiped her own memories to conceal information and perhaps also because of the horrifying realization that the Covenant had extracted her eggs in order to fulfill one of Rambaldi's prophecies. She was also greatly disturbed that she chose to kill an unarmed man in cold blood rather than risk losing her cover as a brainwashed assassin.