Collins v. O'Neil — Opinion of the Court
“ It is impossible to conceive of representatives of two civilized countries solemnly entering into a treaty of extradition, and therein providing that a criminal surrendered according to demand, for a crime that he has committed, if, subsequently to his surrender, he is guilty of murder or treason or other crime, is, nevertheless, to have the right graranteed to him to return unmolested to the country which surrendered him. We can imagine no country, by treaty, as desirous of exacting such a condition of surrender, or any country as willing to accept it. ”
