UPDATE: Located within the indictment documents there is also a Co-Conspirator. It appears Ms. Sours-Edwards boss was also in on the plot to leak the information. [See Page #13 of the indictment]
https://theconservativetreehouse.com/2018/10/17/deep-state-treasury-leaker-arrested-senior-u-s-treasury-official-arrested-for-leaking-financial-forms-to-media/#more-155503
Wow. Thanks.