Last November, as then-President Donald Trump ramped up his dangerous lies about mass voter fraud , a man hopped into a Hummer bearing a QAnon sticker and headed to a Philadelphia vote-counting location to stop what he believed was an election that was being stolen. The QAnon obsessive, along with a co-founder of Vets for Trump, were arrested by Philadelphia police, who found them in possession of an AR-style rifle and a samurai sword .

Two months later, in the nations capital, the same QAnon follower stormed the U.S. Capitol, entering the building alongside dozens of fellow conspiracy theorists who had bought into Trumps lies about the outcome of the 2020 election. Now, nine months after the Jan. 6 attack, hes one of hundreds of Trump supporters who were captured on video violating federal law that day, but who havent yet faced federal charges for their conduct.

Federal authorities have posted some impressive numbers in the nine months since Trump supporters stormed the Capitol in support of his lies about a stolen election, and then left the scene without being arrested, leaving behind injured officers and millions of dollars in damage and security costs. The feds have made more than 625 arrests since Jan. 6 as part of what authorities have repeatedly described as one of the largest investigative and prosecutorial efforts in American history.

Yet even with hundreds of arrests and months of painstaking work in the unprecedented investigation, federal authorities have arrested just a fraction of all the potential defendants who were captured on video committing criminal offenses that prosecutors have said warrant charges.

Law enforcement was unprepared and overwhelmed by the onslaught of pro-Trump rioters on Jan. 6. Now, law enforcement is at risk of being overwhelmed by the mob of Jan. 6 cases that are flooding the system at every step.

In the weeks after the attack, law enforcement officials estimated that 800 people had entered the Capitol. That number stuck around in media coverage for months, becoming a benchmark against which the FBI s progress has been measured. The 800 figure has been mentioned in stories as recently as this week.

In reality, as online sleuths have discovered over the past several months, thats only a fraction of the scope of criminal activity that day. A HuffPost analysis of public-facing data on the Capitol attack, combined with the findings of online investigators working under the #SeditionHunters moniker , shows that the total number of Jan. 6 participants who could face charges if identified tops 2,500.

Federal investigators have quietly ticked up their own estimate. In a budget request earlier this year, the FBI told Congress that approximately 2000 individuals are believed to have been involved with the siege. Law enforcement officials did not dispute HuffPosts 2,500 figure.

That means federal authorities have charged about 25% of the suspects who could face criminal charges for their conduct on Jan. 6. At the current pace, it would take federal authorities until early 2024 to bring cases against 2,500 defendants. And some of the easiest cases to bring, the low-hanging fruit , have already been charged.

Online investigators, who have been responsible for identifying countless Jan. 6 defendants and will play a role in dozens of forthcoming FBI cases, have counted more than 2,000 individuals they say breached the Capitol building. These sleuths refer to the people they say they spotted inside the Capitol as Sedition Insiders, and have collected the highest-quality image theyve found of each rioter (even if that photo was snapped while the suspect was outside the Capitol).

Of that group of Sedition Insiders, the Sedition Hunters believe, more than 1,500 are still at large.