I'm not sure I understand the question, but here's what I think is being asked:
As Beatrice is not a U.S. Citizen or national, they can't compel her to fly to America for deposition or court testimony. As to whether she can be deposed in the U.K.- if she voluntarily agrees to be, then absolutely yes. Happens all the time. And her deposition can be used at trial in lieu of her appearance, as she would be considered "unavailable". It's possible that her father will want her deposed to back up his arguments in court.
As to whether she can be compelled to sit for a deposition- I don't believe so, I think it can only be officially "requested", but I don't have extensive experience with the Hague Convention and private individuals, which I think applies.
And there was a question about Andrew's right to the 5th Amendment privilege:
Technically anyone can invoke the 5th Amendment, but if the other side challenges it, then the Judge decides if the person is justified in doing so. If all criminal statutes of limitations have completely run in the U.S., then it's possible the Court could rule that Andrew has no 5th Amendment privilege.
The 5th amendment is only for self-incrimination against criminal charges. If there is no way for Andrew to be charged criminally, then there is no 5th Amendment protection. I have no idea if this will occur, or if the criminal statutes of limitations have run, but I have seen this issue arise before.
As Beatrice is not a U.S. Citizen or national, they can't compel her to fly to America for deposition or court testimony. As to whether she can be deposed in the U.K.- if she voluntarily agrees to be, then absolutely yes. Happens all the time. And her deposition can be used at trial in lieu of her appearance, as she would be considered "unavailable". It's possible that her father will want her deposed to back up his arguments in court.
As to whether she can be compelled to sit for a deposition- I don't believe so, I think it can only be officially "requested", but I don't have extensive experience with the Hague Convention and private individuals, which I think applies.
And there was a question about Andrew's right to the 5th Amendment privilege:
Technically anyone can invoke the 5th Amendment, but if the other side challenges it, then the Judge decides if the person is justified in doing so. If all criminal statutes of limitations have completely run in the U.S., then it's possible the Court could rule that Andrew has no 5th Amendment privilege.
The 5th amendment is only for self-incrimination against criminal charges. If there is no way for Andrew to be charged criminally, then there is no 5th Amendment protection. I have no idea if this will occur, or if the criminal statutes of limitations have run, but I have seen this issue arise before.