False Statements: 18 U.S.C. § 1001.
This is the statute that Michael Flynn, Roger Stone, Michael Cohen and others were prosecuted under when they lied to Congress or the FBI. In relevant part the statute reads as follows:
whoever, in any matter within the jurisdiction of the executive, legislative, or judicial branch of the Government of the United States, knowingly and willfully—
(1) falsifies, conceals, or covers up by any trick, scheme, or device a material fact;
(2) makes any materially false, fictitious, or fraudulent statement or representation; or
(3) makes or uses any false writing or document knowing the same to contain any materially false, fictitious, or fraudulent statement or entry;
shall be fined under this title, imprisoned not more than 5 years
Conspiracy To Commit An Offense Against Or Defraud The United States: 18 U.S.C. § 371.
I discussed this statute extensively in a prior article entitled The Lay Down Case For Charging Trump (And Others) With Conspiring To Defraud The United States [dailykos.com]. This statute reads:
If two or more persons conspire either to commit any offense against the United States, or to defraud the United States, or any agency thereof in any manner or for any purpose, and one or more of such persons do any act to effect the object of the conspiracy, each shall be fined under this title or imprisoned not more than five years
Full Article: [dailykos.com]
You want someone to be held accountable for their actions, surely you jest.