In the 1943 case Ex Parte Abernathy, the United States Supreme Court ruled on a petition for habeas corpus by two prisoners who were convicted of murder in Oklahoma. The petitioners claimed that their constitutional rights had been violated because they were not allowed to consult with counsel during their preliminary hearing and that this constituted a denial of due process under the Fourteenth Amendment. However, the court denied their claim stating that there was no federal law requiring legal representation at such an early stage in proceedings. Furthermore, it was noted that even if such a right existed, any violation would have been corrected when they received full trials complete with all constitutional protections including access to counsel. Therefore, it concluded there was no basis for granting habeas corpus relief.

The dissenting opinion in the case of Ex Parte Abernathy argued that the majority's decision to deny habeas corpus relief was incorrect. The dissenters believed that Abernathy had been denied his constitutional right to a fair trial, as he was not given an opportunity to present evidence or cross-examine witnesses against him during his court-martial proceedings. They also disagreed with the majority's interpretation of military law, arguing that it did not provide sufficient safeguards for service members' rights and could lead to abuses of power by military authorities. Furthermore, they contended that civilian courts should have jurisdiction over cases involving fundamental constitutional rights, even if they involve military personnel. Thus, in their view, the Supreme Court should have granted Abernathy's petition for habeas corpus and ordered a new trial.