Image copyright Getty Images Image caption Oregon paper released emails between the governor and secret service in March
Facebook’s social media handler will be sued over a list of revelations including emails between the governor and a contractor.
Ohio Attorney General Mike DeWine will launch a civil lawsuit against Meta in Columbus over the social media company’s use of Facebook’s “Facebook Pages”.
It means an open discovery period could allow investigators to put documents on the legal record.
This may mean depositions from company bosses including Mark Zuckerberg.
Facebook was acquired by the Silicon Valley firm in 2012, leaving it in charge of managing the private company’s public profile.
The newly leaked emails, obtained by the Oregonian newspaper under a Freedom of Information Act request, show a wide range of private communications.
These range from internal commentary about changes in policy and publicity risks to the search for a new CEO.
Much of the correspondence was deleted by the company, and the technology Journal has referred to the documents as “Facebook Papers”, but the article by reporter Patrick Timm carried a further report titled “Facebook Papers: Secret State Papers to Attack Lenient Gov’t”.
Mr Timm writes: “The message to the secret service unit for the Oregon governor: Keep your hands off private and confidential information unless we, or the feds, demand that you stop”.
The FBI had been operating on the watch list for Oregon under a state cybercrime alert system, but that information is not known to Oregon governor Kate Brown.
The attorney general’s investigation of Facebook was triggered by the same event last year.
Facebook has come under intense scrutiny in recent months, amid new revelations about the firm’s privacy policies.
Its social media and advertising data were used to target political groups in the lead-up to the US Presidential election.
The firm was last week also hit with fresh civil suits in the US which allege Facebook’s use of data infringes on consumers’ rights.
Four cases filed in New York and California allege that Facebook has infringed the rights of millions of users and demands privacy, security and the ability to control their information.
Previous public outrage prompted the firm to tighten data protection rules in August.