A New York Times report on Christmas Day - “Arms Sales to Saudis Leave American Fingerprints on Yemen’s Carnage” – shone a spotlight not only on the U.S. government’s role in the Saudi regime’s atrocities in Yemen but on attempts by U.S. officials to cover up that role in testimony to Congress.
 
Lying to Congress is a prosecutable offense. For example, Elliot Abrams was convicted of lying to Congress about the illegal U.S. role in the arming of Nicaraguan terrorists and about the U.S. role in the genocide in Guatemala. 

The New York Times reported:  
 
[...]
America’s role in the war was “absolutely essential” to safeguard civilians, the general in charge of Central Command [that is, in charge of U.S. forces in the Middle East], Gen. Joseph L. Votel, told a charged Senate hearing in March.  
[...]
In the March hearing, senators accused the Pentagon of being complicit in the coalition’s errant bombing, and pressed its leaders on how directly the United States was linked to atrocities.

General Votel said the military knew little about that. The United States did not track whether the coalition jets that it refueled carried out the airstrikes that killed civilians, he said, and did not know when they used American-made bombs.
[...]
But Larry Lewis, a State Department adviser on civilian harm who worked with the Saudi-led coalition from 2015 to 2017, said that information was readily available from an early stage.

At the coalition headquarters in Riyadh, he said, American liaison officers had access to a database that detailed every airstrike: warplane, target, munitions used and a brief description of the attack. American officials frequently emailed him copies of a spreadsheet for his own work, he said.

The data could easily be used to pinpoint the role of American warplanes and bombs in any single strike, he said. “If the question was “Hey, was that a U.S. munition they used?” You would know that it was,” he said.
[...]

Incoming House Intelligence Chair Adam Schiff has promised a "deep dive" on the U.S. role in the Saudi regime's war in Yemen in his committee. Other Congressional committees should do the same. In particular, they should compel General Votel to testify, under oath, in both open and closed session, about what Votel knew about the U.S. role in Saudi atrocities in Yemen, and when he knew it; about what he should he have known, and when should he have known it; and about why this knowledge wasn't reflected in Votel's testimony to Congress in March, when the Senate was about to vote on the U.S. role in the war.  
 
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