FBI Director Christopher Wray said a "raw" warning was shared extensively with Capitol Police the night before the Capitol riots.
CHRISTOPHER WRAY: I didn't see that report, which was raw, unverified intelligence, until some number of days after the 6th. But again, that raw, unverified information was passed within, I think, 40 minutes to an hour to our partners, including the Capitol Police, including Metro PD, in not one, not two, but three different ways-- one email, one verbal, and one through the law enforcement portal.
As to why the information didn't flow to all the people within the various departments that they would prefer, I don't have a good answer for that. I will tell you, the Capitol Police and Metro PD are terrific partners to the FBI, especially our Washington field office. I'm grateful for their partnership, and have nothing but admiration for the hard work and courage and professionalism of the men and women who work in both of those agencies.