Another former Facebook employee filed a complaint of wrongdoing with the Securities and Exchange Commission.

The latest complaint - first reported by The Washington Post - alleges that Facebook misled its investors about "dangerous and criminal behavior on its platforms, including Instagram, WhatsApp and Messenger." .

The former employee in the complaint disclosed details of a conversation with a senior communications executive at Facebook, in which he said, after revealing Russia's use of the platform to interfere in the 2016 election, that the scandal would be a "bubble and go away."

Like Frances Hogan (a former Facebook employee whose testimony was recently heard by Congress), the latest whistleblower is also a former member of Facebook's integrity team, which is tasked with combating disinformation, voting interference and other major issues facing the company.

Frances Hogan, a former Facebook employee, gave details of Facebook's suspicious policies (Reuters)

Like Hogan, the former Facebook employee said the company "routinely undermined efforts to combat disinformation, hate speech, and other problematic content for fear of angering former US President Donald Trump and his political allies, or out of concern about potentially undermining user growth."

The SEC filing also describes illegal activity in secret Facebook groups, and Facebook's policy that allows politicians and other high-profile users to circumvent its rules.

The newspaper reported that Mark Zuckerberg and Sheryl Sandberg are aware of the problems, but have not reported them to investors.

Although many of the details sound similar to the complaints of former employees of the company, the complaints are increasing pressure on Facebook, which has spent much of the past month trying to discredit Hogan and downplay the importance of its own research.

Meanwhile, lawmakers have called on Zuckerberg to answer questions from Congress, and Hogan is expected to brief European officials as well.

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