There are several reasons why a alien may face the possibility of deportation:
1. Aggravated felony – there are serious felony offenses, defined by immigration law, that make the alien subject to deportation.
2. Crimes Involving Moral Turpitude – there are statutorily designated offenses that subject a noncitizen to removal or deportation. It is defined by the Board of Immigration Appeals as conduct which is inherently base, vile, or depraved and contrary to the accepted rules of morality and the duties owed between persons or to society in general. Examples of crimes of moral turpitude include assault, domestic violence, drug possession and selling offenses, rape, child abuse, fraud, etc.