On Tuesday, footage was released of "Good Morning America" host Amy Robach privately revealing her frustration with ABC for refusing to air an interview with Jeffrey Epstein's "sex slave" Virginia Roberts.

Unbeknownst to Robach, her words were recorded and sent to Project Veritas, who then published the video this week. Now, ABC News chiefs have reportedly discovered who was responsible was for leak.

According to Page Six, ABC found out that a former employee may be behind the leak due to the fact that sources say they had access to the footage.

While the source says that it would be a "fireable offense" if the person behind it were still employed by the network, those at ABC are now weighing their options as the person they believe is responsible worked for CBS. In turn, this prompted ABC to alert CBS to the potential staffer "as a courtesy."

However, at this time ABC acknowledges that they are not entirely sure that that person is the one behind the leak. "We have good reason to believe this person had access to the footage, but what we don't know is whether they would have shared it directly with Project Veritas or a couple of others and it made its way to Project Veritas," the insider stated.

As for any consequences they may face from ABC for releasing the footage, a rep for the network told Page Six that they "take violations of company policy very seriously" and are "pursuing all avenues to directly determine the source of the leak."

CBS has not publicly commented at this time, but Page Six reported that the female staffer has since been fired.

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The CBS logo is seen at the CBS Building, headquarters of the CBS Corporation, in New York City on August 6, 2018. ANGELA WEISS/AFP/Getty Images