(Published Sept. 25, 2021 Updated Oct. 18, 2021)

But the records, and information from two people familiar with the matter, suggest that federal law enforcement had a far greater visibility into the assault on the Capitol, even as it was taking place, than was previously known.

At the same time, the new information is likely to complicate the government’s efforts to prove the high-profile conspiracy charges it has brought against several members of the Proud Boys.