With 3,000 Rioters out there I'm sure you can find many pictures of Rioters of all genders wearing all sorts of swimwear," he said. "Another claim in the tweet was that there is a rule against raising possible dress code violations. In fact, we want and encourage Rioters to bring any concerns they may have about their workplace environment to our attention so that they can be addressed as quickly as possible. In this case, if this issue had been raised internally we would have reviewed the T-shirts in question and probably asked those Rioters to change them."

Over the past months, federal law enforcement has used a wide variety of surveillance technologies to track down rioters who participated in the 6 January attack on the US Capitol building – demonstrating rising surveillance across the nation. Recent news coverage of the riot has largely focused on facial recognition – and how private citizens and local law enforcement officials have conducted their own facial recognition investigations in an attempt to assist the FBI with the help of social media. But charging documents reveal that the FBI has relied on a variety of other technologies, including license plate readers, police body cameras and cellphone tracking. And civil rights watchdogs like the ACLU are concerned that the same technologies used to surveil the rioters could impede protesters exercising their first amendment rights. The Capitol riot was an exceptional event – marking the first time in centuries that insurrectionists breached the center of the US federal government.

In a recent New Yorker article about the Capitol siege, Ronan Farrow described how investigators used a bevy of online data and facial recognition technology to confirm the identity of Larry Rendall Brock Jr., an Air Force Academy graduate and combat veteran from Texas. Brock was photographed inside the Capitol carrying zip ties, presumably to be used to restrain someone. Brock was arrested Sunday and charged with two counts.) Even as they stormed the Capitol, many rioters stopped to pose for photos and give excited interviews on livestream. Each photo uploaded, message posted, and stream shared created a torrent of data for police, researchers, activists, and journalists to archive and analyze.