Looks like an interesting series

Matt Taibbi: "The FBI's Transformation, from National Police to Domestic Spy Agency. Part One: 'Disruption'".

But Friend’s complaint is only partially about J6. His concerns began in his first days in Quantico, and continued across years of watching the Bureau collect intelligence or open cases for non-operational reasons. Whether they involve J6 or not, a consistent theme of his stories is the FBI using its authority to “disrupt” or intimidate targets as an end in itself, as opposed to collecting evidence with the aim of prosecuting.

One example involved a British doctor who’d been at J6. The suspect was not exactly Pablo Escobar. He did enter the Capitol, but surveillance showed he meekly stayed behind velvet ropes once inside, and under questioning was practically shaking with guilt over having taken a free Capitol tourist brochure as a souvenir. Though he seemed unlikely to be charged, he was booted from his medical practice after being interviewed, and Friend wondered if this even indirectly had been the point.