A man who was photographed carrying the Confederate flag after storming the Capitol building has been arrested.
Pictures of Kevin Seefried, from Delaware, were widely published by the media following last week’s deadly unrest, with the authorities using those images to identify him.
He was tracked down by the FBI after his son Hunter bragged to a co-worker about how he had been involved.
Prosecutors say the pair entered the Senate through a broken window – adding they were part of a larger group that verbally confronted members of the Capitol Police.
They have both been charged with unlawfully entering a restricted building, violent entry and disorderly conduct on Capitol grounds – as well as the degradation of government property.
According to court documents, they both admitted being present at the riots when they voluntarily spoke to the FBI on Tuesday.
The Confederate flag is widely seen as a racist symbol as it celebrates the forces of the Confederacy, who fought to preserve slavery in the American Civil War.
FBI director Christopher Wray says more than 100 people have been arrested over the violent siege – and now, detectives are examining those who may undermine the safety of Joe Biden’s inauguration next week.
“We’re looking at individuals who may have an eye towards repeating that same kind of violence that we saw last week,” he added.
Offering an update into the investigation, Mr Wray added: “From 6 January alone, we’ve already identified over 200 suspects. So we know who you are, if you’re out there, and FBI agents are coming to find you.”
In Pennsylvania, a retired firefighter has been detained after prosecutors alleged that he threw a fire extinguisher at police during last Wednesday’s mob attack.
Robert Sanford has been described as a “danger to the community”, as well as to “democracy and our legislators”.
A search warrant executed at the 55-year-old’s home uncovered paraphernalia referencing the far-right “Proud Boys” group, but according to his lawyer, Sanford is not a member of any extremist group.
Many of those arrested so far were captured on social media bragging about their role in storming the Capitol, and the FBI is currently combing through more than 100,000 videos and photographs.
The riots followed a rally in which President Donald Trump repeated a range of baseless election grievances.
Five people died during the riots – including an officer and a woman who was shot by police.
Security has been stepped up in Washington DC amid fears that there could be further unrest when Mr Biden is inaugurated next Wednesday, with officials claiming that armed protests are planned nationwide.