FBI official Steven D'Antuono says the bureau has opened 160 case files relatd to U.S. Capitol insurrection.

"That's just the tip of the iceberg."

Acting U.S. attorney Michael Sherwin on U.S. Capitol investigation.

"I think the scope and scale of this investigation in these cases are really unprecedented not only in FBI history but really in DOJ history."

He says the Capitol Grounds are, essentially, a crime scene.

SHERWIN describes "mind-blowing" range of criminality. Range of charges include:

-Simple trespassing
-Theft of mail
-Theft of digital devices
-Assault on local/fed officers
-Theft of potential national security info
-Felony murder

SHERWIN adds this is just the beginning.

He says they're charging some of these suspects quickly on the first possible charge, which buys law enforcement time to develop far more significant investigations leading to bigger charges.

SHERWIN: "We're looking at significant felony cases tied to sedition and conspiracy."

SHERWIN: "Some of those rioters specifically targeted members of the media and assaulted them."

SHERWIN says people will be "shocked" by some of the non-public details of things that happened inside the Capitol.

SHERWIN on pipe bombs outside RNC and DNC:

"They were real devices, they had explosive igniters." He doesn't know why they weren't detonated.

SHERWIN says prosecutors are treating this as a "significant counterterrorism or counterintelligence investigation."

He says they're looking at "money, travel records, disposition, movement, communicaftion records."