His arrest follows an American arrest warrant dating from 1978 against the filmmaker, in a case of morals.
Roman Polanski is a French citizen, a renown and international artist now facing extradition. This extradition, if it takes place, will be heavy in consequences and will take away his freedom.
Am I missing something or isn't that the whole point? Whole thing here.
Update: I'm just thinking out loud here, but this would be a GREAT episode for the ripped-from-the-headlines types at "Law and Order."