Even the aliens know to avoid Detroit, dude.
You sure that's not where they dump their dregs, kind of like an alien version of transporting convicts to Australia?
"Qa'lorixi'an'frt7666, you destroyed four planets, committed multiple acts of mass destruction, and illegally parked in a no parking zone beside Barnard's Star, for these crimes, you shall face the ultimate sanction. You will be taken from this court, removed to the planet Earth, and shall spend the rest of your life in the area known as Detroit. May whatever deity you believe in have mercy on your soul."