The perjury case officially has been referred to the US attorney for the District of Columbia by the House of Representatives.  In their letter to the DA, House Oversight Committee Chairman Jason Chaffetz (R, UT) and Judiciary Committee Chairman Bob Goodlatte (R, VA) pointed out that

[Then-]Secretary [now Democratic Party Presidential candidate Hillary] Clinton stated “there was nothing marked classified on my emails, either sent or received.”

But

FBI Director James Comey said July 5 that a “very small number of the emails containing classified information bore the markings indicating the presence of classified information.”  At least three emails had a (C) for Confidential which is the lowest level of classification. Fox News first reported in June that classified markings existed, despite Clinton’s public claims.

And

Clinton told [Benghazi Select Committee member Jim (R, OH)] Jordan that her team “went through every single email.”

But

The FBI Director said his investigators found that Clinton’s lawyers did not read all the emails, and relied on a narrow set of search terms to identify which emails were work-related.

“The lawyers doing the sorting for Secretary Clinton in 2014 did not individually read the content of all her e-emails,” Comey said July 5. Instead, they “relied on header information and used search terms.”

And

Clinton also testified to Congress there was only one server.

But

[T]he FBI Director said investigators found “Clinton used several different servers and administrators of those servers during her four years at the State Department and used numerous mobile devices to review and send e-mail on that personal domain.”

And

“I provided you, with all my work related emails, all that I had.  Approximately 55,000 pages. And they are being publicly released,” Clinton testified.

But

FBI investigators found “several thousand work related emails that were not in the group of 30,000 that were returned by Secretary Clinton to State in 2014.”

Keep in mind that Clinton’s claims made before those two committees were made under oath.

Second question: will President Barack Obama’s (D) DoJ, which owns the DC District Attorney and the James Comey FBI, do a more thorough job of investigating this than the DoJ and the FBI did of Clinton’s classified email handling gross negligence (which Comey was pleased to call “extreme carelessness”) with her private email server, which she used for official State Department business? Steven Pomerantz, “a retired assistant FBI director and 28-year-veteran of the bureau,” said that

…a perjury review is generally straightforward for agents.

“They look at the transcript of the testimony they provided in light of what they know to be, suspect to be the truth. They investigate both sides and take the aggregate and turn it over to the prosecuting authority for a decision.

“Since the Director (Comey) already established what she (Clinton) said and the investigation is complete, it would be a relatively simple matter to make a decision about perjury…given the history of this, it’s hard to say—it would seem to me a matter of weeks not months in this case.”

We’ll know soon, especially regarding the second question.