From the USSS scandal thread: throw the US Postal Inspection Service on the giant pile of experts who predicted the day would get violent and were ignored.
“The threat assessment outlined a number of rally points where participants were planning to meet before heading to Washington, DC, as well as a number of posts on Parler in support of the march and calling for violence. The posts included in the summary had incredibly inflammatory language, including: “Hang EVERY TRAITOR ON JAN 6Th!”, “When Antifa Communists and the Bolsheviks Leninists and Marxists show up, stomp them into oblivion” and “NO MORE MARCHING ACTION TIME”.
Postal inspectors circulated both assessments far and wide. Recipients included officials at the Department of Justice, Department of Homeland Security, the FBI, US Capitol Police, Maryland and Virginia state governments, New York State troopers, the Supreme Court, the Senate, the Air Force, the Navy and even Amtrak. Yet, despite weeks of notice of serious threats of violence, many of these same agencies failed to adequately respond.”
https://www.citizensforethics.org/reports-investigations/crew-investigations/usps-law-enforcement-arm-warned-of-violence-on-january-6/