You are a criminal and not a "homebred American". You should stop punishing yourself and return to your home country. It sounds like you have the skills to be very successful there.
So is 'American' culture or tribe affiliation? If he/she grew up in America then deporting him/her is like sending them to a foreign country for all intents and purposes. What if he/she doesn't even know her/his native language? It's not such a black and white issue, as much as you might want it to be.