In the case of United States v. Witkovich, 1956, the U.S. Supreme Court ruled on a matter concerning immigration law and its enforcement by government officials. The defendant, an alien who had been ordered to leave the country but hadn't done so due to lack of means, was asked by immigration authorities for information about his finances and efforts made towards departure from the U.S., as per Section 242(d) of Immigration and Nationality Act (INA). He refused to provide this information arguing that it violated his Fifth Amendment rights against self-incrimination. However, in a unanimous decision led by Justice Hugo Black, the court held that INA's provision did not violate any constitutional rights because it only required aliens under deportation orders to disclose facts pertinent to their ability or willingness to leave; it didn’t compel them into admitting criminal liability or providing evidence for prosecution purposes.

In the dissenting opinion for United States v. Witkovich, Justice William O. Douglas argued that the statute in question was too vague and broad to be constitutionally valid. He contended that it gave excessive discretion to immigration officials by allowing them to request any information they deemed necessary from an alien without clear guidelines or limitations on what could be asked. This lack of specificity, he believed, made it impossible for individuals subject to this law to know exactly what was required of them and potentially subjected them to arbitrary enforcement actions based on their responses (or lack thereof) - a violation of due process rights under the Fifth Amendment. Furthermore, Justice Douglas expressed concern about potential misuse of such wide-ranging authority by government officials which could lead towards authoritarianism rather than democracy.