In the case of Brown v. Walker, 1895, the United States Supreme Court ruled on a matter concerning self-incrimination and immunity from prosecution. The appellant, William H. Brown was subpoenaed to testify before a grand jury regarding his role in alleged illegal activities by railroad companies but refused to do so for fear of self-incrimination. He was then granted immunity from prosecution under federal law if he testified truthfully about his involvement in these activities; however, he still declined to testify and was subsequently held in contempt of court. The central issue brought before the Supreme Court revolved around whether or not an individual could be compelled to testify after being granted immunity from prosecution - essentially questioning if this violated their Fifth Amendment right against self-incrimination. The Supreme Court ultimately decided that compelling testimony did not violate an individual's rights as long as they were provided with full transactional immunity (i.e., complete protection against future prosecutions related to what they might reveal). This decision upheld Congress' power to grant such immunities while also protecting individuals' constitutional rights.

In the dissenting opinion for Brown v. Walker, Justice Brewer argued that compelling a witness to testify against himself violated his Fifth Amendment rights. He believed that the immunity statute in question did not offer full protection from prosecution and thus was insufficient to override these constitutional protections. According to him, forcing someone to choose between self-incrimination or punishment for contempt constituted coercion and contradicted the principles of free will inherent in American law. Furthermore, he contended that even if such testimony could not be used directly against a person in criminal proceedings due to statutory immunity, it could still indirectly harm them by providing leads or clues for further investigation - something which he viewed as fundamentally unfair and contrary to the spirit of the Constitution's safeguards against self-incrimination.