[Toy Soldier]

You would have to change the entire system really... Gaining asylum status = gaining the rights and privileges of a citizen of that country. In order to deport someone for a crime, you would have to either change that, OR make "exile" a valid punishment for the crime in question.

Then you have further moral implications: if someone is convicted of being a murderer or rapist, is it "right" to simply send them back to their country of origin as a free person who can then do the same things to innocent people in that country? You would surely have to have some system where they are deported and also placed with the authorities in that country. The first problem being that many asylum seekers come from countries where that system is non-existent... Or where it does exist... It is a death sentence by any other name (which is a separate debate).