lawfag here

joe degenova is first rate

tells all witch hunt victims to take the 5th

absolutely agree

here is a short piece on the topic inc flynn case

worth a read and its short

if not the gist is

As a general matter, witnesses may invoke the Fifth Amendment privilege during a congressional investigation with

regard to testimony or documents that are: (1) testimonial (“relate[s] a factual assertion”); (2) self-incriminating (any

disclosures that tends to show guilt or that furnishes any “link in the chain of evidence” needed to prosecute); and (3)

compelled (not voluntarily given).

https://fas.org/sgp/crs/misc/fifth.pdf