In the case of In re Groban et al., 1956, the Supreme Court ruled on whether or not an individual has a constitutional right to have counsel present during investigative proceedings. The case arose when three Ohio businessmen were subpoenaed by the state fire marshal for questioning regarding a fire at their plant. They requested legal representation during this questioning but were denied. After refusing to answer questions without their lawyers present, they were held in contempt and jailed. The men appealed their conviction arguing that it violated their Fifth Amendment rights against self-incrimination and due process under law as well as Sixth Amendment rights to assistance of counsel. However, the Supreme Court upheld the convictions with a 5-4 decision stating that these protections only apply in criminal cases and not investigatory proceedings like those conducted by administrative agencies such as Ohio's Office of State Fire Marshal. This ruling clarified that individuals do not have an absolute right to legal representation during all types of government investigations which can be seen as limiting some aspects of citizens' constitutional protections.

In the dissenting opinion for In re Groban et al., Justice Hugo Black argued that the majority's decision violated the Fourteenth Amendment by denying individuals their right to a fair hearing. He contended that allowing an individual to be interrogated in private, without legal counsel or witnesses present, was unconstitutional. Furthermore, he believed this ruling could potentially lead to abuses of power and coercion during questioning. Justice Black also expressed concern over potential violations of due process rights as well as Fifth Amendment protections against self-incrimination. He maintained that these constitutional safeguards should not be compromised even when dealing with matters related to state security or public welfare investigations.