Burkman, who previously promoted conspiracy theories involving the 2016 death of Democratic National Committee staffer Seth Rich, says he and his staff are now vetting additional accusations against Mueller.
The odd sequence of events began about two weeks ago, when an email account ostensibly belonging to a Florida woman began contacting reporters claiming that a mysterious individual had offered her money to say Mueller had behaved inappropriately when they worked together in the 1970s.
After the news of the FBI's investigation broke, Burkman reiterated the claims of paying a woman were false.
When a matter is referred to the Federal Bureau of Investigation, the agency must investigate the merits of the complaint.
Though she wrote in the email that Mueller was "always very polite to me, and was never inappropriate", the law firm where Parsons said she worked alongside him - Pillsbury Winthrop Shaw Pittman, known at the time as Pillsbury, Madison and Sutro - said it had no record of Parsons working there.
She said Christensen was reluctant to explain specifics and urged her to download Signal, a secure messaging app.
She says he offered to giver her $20,000 and pay off her credit card debt. Reluctantly, I downloaded the app and he called me on that app a few minutes later, ' she wrote, according to the Atlantic. The firm said no one by that name worked at that firm with Mueller in the 1970s.
Atlantic storm system expected to develop into a named stormduring the weekend
Tropical Storm Oscar became Hurricane Oscar, officials with the National Hurricane Center said on October 28. Hurricane season in the Atlantic Ocean usually starts from the month of June and lasts till November 30.
Burkman is a GOP lobbyist and Mueller critic who has said he would be unveiling allegations against the special counsel at a press conference Thursday. A spokesman for the law firm did not return a request for comment.
Taub, a legal scholar at the South Royalton law school, has never met Mueller.
Researcher Aric Toler of the open-source reporting website Bellingcat established that the "employees" of the "intelligence agency" listed on LinkedIn include photos of models from commercially available stock photos or, in at least one case, the actor Christoph Waltz.
"Mueller is a bad guy, not just because of what he does in the courtroom, but because of what he does outside of the courtroom", Burkman said.
Taub had a amusing feeling about the email from Frick on October 22, and took screenshots of it, and sent it to two friends - Jed Shugerman, a professor at Fordham University, and Mimi Rocah, a professor at PACE University, both of whom comment on legal affairs for MSNBC.
Trump and his allies have long tried to discredit Mueller, accusing him of orchestrating a politically motivated "witch hunt", even though his probe into the President's campaign has produced dozens of indictments against Trump associates and Russian government operatives, including Trump's former campaign chairman Paul Manafort and national security adviser Michael Flynn.