Meta CEO Mark Zuckerberg took the stand again on Tuesday for day two of the Federal Trade Commission (FTC) vs. Meta Platform antitrust trial. Zuckerberg denied purposely creating a social media monopoly and the FTC cited decades-old Zuckerberg memos to bolster its claims of a monopoly.

The court heard that Zuckerberg was concerned about a trial and in 2018 he considered spinning off Instagram over concerns that he might eventually be forced to do so.

At issue in the trial are the Meta purchases of Instagram in 2012 and WhatsApp in 2014, which the FTC says were made to freeze out potential Facebook competitors. Zuckerberg’s defense is that the acquisitions were only about building scale and growth and not to build a monopoly.

In addition, Meta says there are now numerous competitors in the marketplace since the social media landscape has greatly changed since the acquisitions and since the FTC initiated this case five years ago. If the FTC proves its case, Meta could be forced to sell or spin off Instagram and WhatsApp.

As the trial continues, other witnesses expected to be called by the FTC include Sheryl Sandberg, former chief operating officer, as well as chief technology officer Andrew Bosworth and the heads of both Instagram and WhatsApp. Other prosecution witnesses called could include executives of competitive companies such as TikTok, X and Google.