In all the comments online on the legality of seizing control of the tanker, I was struck by this question:
If the Trump administration did it on the grounds that it was transporting sanctioned oil, why was the same not done with tankers transporting sanctioned Russian oil?
So we really need to find out the grounds under which the tanker was seized. If it was the tanker and not its cargo that was the subject of the warrant, does the US have to return the oil to Venezuela?