Most assuredly, especially if they thought they had a good chance of getting away with it. They don't need it, however. They already have the largely overblown threat of foreign cyber-terrorists, child pornographers, malicious crackers and their own fundamental ignorance as an excuse to subvert your encryption, read your email, listen in on your personal conversations, and censor your web site's content. It was barely seven years ago that approximately 80 peaceful men, women, and children were burned alive in their home near Waco, Texas by the combined efforts of the U.S. Defense Department and other government paramilitary units, the U.S. Treasury Department's Bureau of Alcohol, Tobacco, and Firearms, and the Federal Bureau of Investigation. Over two years later, Congress held lengthy hearings with the stated purpose of finding the truth.
Any serious investigation looks at physical evidence and examines that evidence directly.
When serious investigators must rely on interpretations, they do not seek out interested parties to give those interpretations, but Congress ignored most of the available physical evidence. When they did look at evidence, Congress was highly selective. When interpretations were sought, most came from interested parties. When questions were asked, government employees were permitted to avoid answering. This is indicative of the importance Congress generally attaches to seeking truth.