No, the SCOTUS has made clear that you cannot be tried in abstentia.
This case requires us to decide whether Federal Rule of Criminal Procedure 43 permits the trial in absentia of a defendant who absconds prior to trial and is absent at its beginning. We hold that it does not.
US courts can still try him in absentia, i.e. if he’s not present in the courtroom.
If he’s in a country with an extradition treaty with the US, e.g. the UK, he can be extradited to the US for the trial or with a conviction.
No, the SCOTUS has made clear that you cannot be tried in abstentia.