FBI Special Counsel Robert Mueller reportedly obtained a search warrant for records of the "inauthentic" accounts Facebook shut down earlier this month and the targeted ads these accounts purchased during the 2016 election.
Legal experts say the revelation has enormous implications for the trajectory of Mueller's investigation into Russia's election interference, and whether Moscow had any help from President Donald Trump's campaign team.
"This is big news — and potentially bad news for the Russian election interference 'deniers,'" said Asha Rangappa, a former FBI counterintelligence agent.
Rangappa, now an associate dean at Yale Law School, explained that to obtain a search warrant a prosecutor needs to prove to a judge that there is a reason to believe a crime has been committed. The prosecutor then has to show that the information being sought will provide evidence of that crime.