In fact, a year into Mueller’s probe and nearly two years after the launch of the original FBI investigation (which we now know was codenamed CROSSFIRE HURRICANE) there are more open questions—and concerning assertions—than there were when the case began.

The broad outlines of the investigation are by now clear: Mueller’s probe involves at least five distinct lines of inquiry—money laundering and past business deals, information influence operations, active cyber penetrations, suspicious Russian campaign contacts, and obstruction of justice. However, in recent weeks, it’s become clear the investigation has grown, with little public understanding, into something that’s clearly much larger than a “simple” investigation into Russian’s campaign meddling.

The year of Mueller’s probe has established four conclusions inconvertibly:

1. Russia did it

Outside of the fever-swampy corners of @realdonaldtrump’s Twitter account and Congressman Devin Nunes’ conspiracies, the rest of the US government has concluded, clearly, that Russia was behind a multifaceted, complex influence operation and active cyber attack on the 2016 presidential campaign. Before Mueller’s probe even began, the nation’s intelligence community had concluded that fact, largely based on classified information. Then Mueller’s indictment of the Internet Research Agency established publicly beyond any question that people close to the Kremlin meddled extensively, expansively, and expensively in the election. Meanwhile, the Senate Intelligence Committee also on Wednesday announced that there was bipartisan agreement that not only had Russia attacked the 2016 presidential election but that it had done so to aid Donald Trump and harm Hillary Clinton.

2. There’s a troubling timeline

The revelations since Mueller’s appointment has established plenty of questions about the unfolding aspects of the Russian attack and the campaign’s potential knowledge of it, including that George Papadopoulos reportedly was telling Australian diplomats in London that there was damaging information on Clinton weeks before word about the DNC thefts leaked. Add in other developments, from the aborted attempts to restart a Trump Tower Moscow Project to candidate Trump’s musings about wanting Russia to release Clinton’s emails to Michael Cohen’s payments to Stormy Daniels to the still-unexplained attempt to change the GOP platform to be more pro-Russia to the odd telephone calls and meetings during the transition, and it’s clear there’s a lot more explaining to do.

3. People are lying—and committing crimes

Or maybe just everyone is forgetting about the truth a whole lot, consistently, when it comes to Russia. It’s notable that so many of the president’s top aides, from Attorney General Jeff Sessions to Jared Kushner to Donald Trump Jr. to Michael Flynn to George Papadopolous have gotten in trouble because of “forgetfulness,” omissions, or outright lies concerning meetings with Russians and Russian officials during the campaign and the transition.

4. This is bigger than anyone thinks

Mueller’s probe today might just be the largest corruption investigation in recent American history, involving not just the attacks by the Russian intelligence services, the FSB and the GRU, on the election and Trump’s relationships with Vladimir Putin’s oligarchs but also examining the seemingly related and interconnected influence of a variety of foreign countries on Washington, including Qatar, the United Arab Emirates, and potentially even China. We’ve seen some of the capital’s top lobbyists and lobbying firms already felled by the investigation. And there’s plenty of strange activity still unexplained, including a meeting by Erik Prince, the brother of Education Secretary Betsy DeVos, in the Seychelles that may have been an attempt to set up a backchannel with Russia.

So, with those four collections of facts and implications established in the first year of the Mueller probe, where does the investigation head next? We appear to be entering a new stage of the inquiry, one that focuses primarily on how the puzzle pieces connect.