Special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE did the job he was asked to do, seemingly unfazed by the mindless babble of speculating reporters or the panicked political arrows fired his way from all sides in Washington over nearly two breathless years.

On Friday, he completed that work and delivered a final report in the same understated style with which he accepted the job in May 2017. In between, he was as invisible and mythical as the Wizard of Oz, as he conducted a methodical investigation.

Let the record reflect these four instant takeaways:

There were no major disagreements between Mueller and his managers at the U.S. Department of Justice (DOJ).

The Russians who tried to interfere in the 2016 election were exposed and charged — but no American was charged with any effort to conspire with Moscow and hijack the election.

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There still are other legal threats out there for Trump and his team, such as cases winding through the U.S. Attorney’s Office in Manhattan. And there will be days and weeks of debate about what’s in, and not in, the Mueller report.

What likely won’t get much debate, but unquestionably played an essential role in the history of the case and the outcome of the report, was the firm decision by Trump attorneys Jay Sekulow Jay Alan SekulowNow, we need the election monitors Judge denies Trump's request for a stay on subpoena for tax records Judge throws out Trump effort to block subpoena for tax returns MORE and Rudy Giuliani Rudy GiulianiThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting CIA found Putin 'probably directing' campaign against Biden: report Democrats fear Russia interference could spoil bid to retake Senate MORE to not let their client testify.

That’s not to say the president didn’t cooperate. His organization, campaign, inaugural committee and White House produced millions of pages of documents, and he submitted written answers to prosecutors about his conduct prior to Election Day. Nearly all key events were illuminated by this cooperation.

Such disclosure likely was enough to satisfy Mueller, since we know the prosecutor in the end didn’t force the president to testify by subpoena.

But the Trump legal team’s decision to steadfastly restrain their client from testifying — a client whose natural tendency is to fight when accused, tweet when challenged, and debate his detractors — almost certainly kept him from the sort of perjury traps that felled other figures in the case, such as Flynn and Papadopoulos, or that two decades earlier beguiled Bill Clinton William (Bill) Jefferson ClintonChelsea Clinton: Trump isn't building public confidence in a vaccine Hillary Clinton launching podcast this month GOP brushes back charges of hypocrisy in Supreme Court fight MORE as president. (Remember the Paula Jones deposition perjury?)

The public wants and deserves more transparency going forward. But while jeopardy lurked with an open criminal case, the president’s lawyers took a wise course that was in his personal legal interest. And that is what lawyers are supposed to do.

Now, Mueller’s investigations leave one major mission unfinished: meting out justice to the intelligence, congressional, FBI and DOJ officials who appear to have used a political dirty trick to falsely weave an unproven narrative of Russia collusion.

Unverified political opposition research never should be treated as actionable intelligence or Foreign Intelligence Surveillance Act (FISA) evidence, as it was in this case.

Just hours before Mueller’s report arrived, new evidence emerged of just how egregious the FBI acted in the early days of the Russia probe.

Fox News’s brilliant reporter Catherine Herridge obtained new text messages Friday showing Deputy FBI Director Andrew McCabe Andrew George McCabeGraham: Comey to testify about FBI's Russia probe, Mueller declined invitation Barr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' GOP votes to authorize subpoenas, depositions in Obama-era probe MORE and his chief lawyer, Lisa Page, were discussing credibility issues and “bias” about a key human source whose work was to support the FISA warrant used to first spy on the Trump campaign in October 2016.

Those credibility issues likely were hidden from the judges who approved the warrant of Trump campaign adviser Carter Page (no relation to Lisa Page). As I have reported, the FBI also possesses emails showing concerns with the evidence it was going to use to support the FISA warrant.

Likewise the bureau didn’t disclose to the court that:

Such omissions are so glaring as to constitute defrauding a federal court. And each and every participant to those omissions needs to be brought to justice.

An upcoming DOJ inspector general’s report should trigger the beginning of that accountability in a court of law, and President Trump can assist the effort by declassifying all evidence of wrongdoing by FBI, CIA and DOJ officials.

Accountability also must be handed out in the court of public opinion, where senior members of Congress, such as Rep. Adam Schiff Adam Bennett SchiffChris Matthews ripped for complimenting Trump's 'true presidential behavior' on Ginsburg Trump casts doubt on Ginsburg statement, wonders if it was written by Schiff, Pelosi or Schumer Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-Calif.) and Sen. Mark Warner Mark Robert WarnerIntelligence chief says Congress will get some in-person election security briefings Overnight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' House approves bill to secure internet-connected federal devices against cyber threats MORE (D-Va.), and former members of the intelligence community, such as John Brennan John Owen BrennanJournalism or partisanship? The media's mistakes of 2016 continue in 2020 Comey on Clinton tweet: 'I regret only being involved in the 2016 election' Ex-CIA Director Brennan questioned for 8 hours in Durham review of Russia probe MORE and James Clapper James Robert ClapperOn China, Biden is no Nixon — and no Trump The Hill's 12:30 Report - Speculation over Biden's running mate announcement Trump slams former intelligence officials to explain 'reluctance to embrace' agencies MORE, along with several major news organizations, spun tall stories of a Watergate-sized criminal conspiracy between Donald Trump and Vladimir Putin Vladimir Vladimirovich PutinEx-Trump national security adviser says US leaders 'making it easy for Putin' to meddle The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Putin calls on UN to strengthen World Health Organization MORE.

Mueller’s anticlimactic finish to the special counsel’s probe on Friday made clear no such Trump-Putin criminal conspiracy existed. If it did, it would have been charged.

Trump can help the American public reconcile these issues, too, by declassifying all briefings to Congress’s “Gang of Eight” leadership, so that the public can see what our leaders were being told behind closed doors and what they were claiming on the public airwaves.

This accountability is essential to ensuring the nation never endures another travesty like the Russia collusion narrative.

John Solomon is an award-winning investigative journalist whose work over the years has exposed U.S. and FBI intelligence failures before the Sept. 11 attacks, federal scientists’ misuse of foster children and veterans in drug experiments, and numerous cases of political corruption. He serves as an investigative columnist and executive vice president for video at The Hill.