Special counsel Robert Mueller's probe is investigating any possible role President Trump's former national security adviser Mike Flynn may have played in a plan to snag Hillary Clinton's lost emails from Russian hackers, according to a report published Friday.

Longtime Republican activist Peter Smith led the effort to find the hackers he believed may have stolen the 2016 Democratic presidential nominee's thousands of emails from her days as secretary of state.

Communications and documents indicate Smith believed Flynn was an ally on that initiative, according to the Wall Street Journal. Federal investigators are looking into whether Flynn secretly coordinated with Russia to obtain any of the 33,000 emails Clinton destroyed after it was revealed she had used an unauthorized private email server while in the State Department.

Smith wanted the emails because he believed they could hold damaging information about Clinton.

Trump's former campaign chairman Paul Manafort, Donald Trump Jr., and Jared Kushner all met with a Russian lawyer in June 2016 after being promised intel on Clinton. Trump Jr. claims the meeting didn't bear any dirt on Clinton and turned into a Russia lobbyist's attempt to lobby the three men on adoption policy.