The spousal privilege exists as a matter of legislation, but there is a secondary opportunity when it comes to other family members despite the absence of law protecting the relationship. Federal Rule of Evidence 501 allows for the ad hoc creation of privilege based upon “reason and experience.” And the reason and experience reflected in the Fourth Circuit’s Under Seal v. United States (no relation to the singer), by Judge Stephanie Thacker, speaks volumes about the government’s ability to compel a son to testify against his father.
Via the Wall Street Journal Law Blog:
The investigation was launched, according to the opinion, after Maryland sheriff’s deputies responded to a domestic violence 9/11 complaint at the father’s house, where they found drug paraphernalia and a mass of firearms.
The child, known in the opinion as “Doe Jr.,” lived with his father at the time, and moved to quash the request that he testify against his father. Doe Jr. argued he was protected by a so-called “parent-child privilege.” He argued, according to the opinion:
In a case like this, where the Government seeks to solidify a criminal case against the father by compelling the child’s testimony, the necessary conclusion on the child’s part will be that he, [Doe Jr.], is responsible for his father’s prosecution. The damage to the father-son relationship is, under these circumstances, as certain as it is incalculable.
The district court granted the motion, finding that a privilege did exist.


