I see no need for chemicals.
What (Representative) Eddie has outlined is what SHOULD happen to people who blatantly flout the Law. Congress should have the power to arrest people who ignore a subpeona to testify, and/or refuse to hand over documents that they are either required to by law to hand over, or who are subject to an order by a Federal Judge to hand over.
IMO, Congress should have its own Law Enforcement Staff; sworn officers entirely independent of the DoJ, who report directly to the Judiciary Committees, solely for the purpose of enforcing Congressional instructions. In a situation where orders from the two Judiciary committee might clash, an order to enforce a law and/or a subpoena can be made by either committee, and the other committee cannot overrule it.
Mnuchin, Rettig, Barr and McGahan should all be behind bars right now.