Washington, D.C. – The incoming chairman of the Senate Intelligence Committee is calling the Capitol a “crime scene” with evidence that needs to be preserved.

Virginia Sen. Mark Warner has written 11 telecommunication and social media companies asking them to immediately preserve content and associated meta-data connected to the insurrectionist attack on the Capitol on Wednesday. Those companies include mobile carriers AT&T, T-Mobile and Verizon and from the social media world — Apple, Facebook, Gab, Google, Parler, Signal, Telegram and Twitter.

Warner says the FBI and other law enforcement agencies investigating the events of that day are trying to piece together what happened when supporters of President Donald Trump rioted at the Capitol.

The Virginia Democrat tells the companies that “messaging data to and from your subscribers that may have participated in, or assisted, those engaged in this insurrection — and associated subscriber information — are critical evidence in helping to bring these rioters to justice.”