Without locking him up there is no way to really stop someone from leaving.
We could have asked the court to seize his passport, but the judge surprised us with a ruling from the bench. He was gone from the country a bit to fast to react. There is no guarantee we would have been granted the passport seizure, but I think there would have been reasonable odds of it.
and not that seizing his passport would have made it impossible to run, but it would have made it harder. Oh well.