In the 1952 case Rosenberg et al. v. United States, Julius and Ethel Rosenberg were convicted for conspiracy to commit espionage by passing atomic bomb secrets to the Soviet Union during World War II. The Rosenbergs appealed their conviction on several grounds including that they had been denied a fair trial due to prejudicial publicity, that there was insufficient evidence against them, and that capital punishment was an excessive penalty in this instance. However, the Supreme Court upheld their convictions and death sentences with Justice Felix Frankfurter abstaining from voting on whether or not to grant certiorari (a writ seeking judicial review). This decision marked a significant moment in Cold War history as it reflected heightened fears of communist infiltration within American society.

In the dissenting opinion for Rosenberg et al. v. United States, Justice William O. Douglas argued that the Rosenbergs' trial was unfair due to public pressure and hysteria surrounding the case, which he believed influenced their conviction and death sentence. He also contended that there were legal errors made during their trial, including improper instructions given to the jury about what constituted "espionage." Furthermore, he criticized how evidence from a co-conspirator who did not stand trial with them was used against them without giving them an opportunity to cross-examine him in court - a violation of their constitutional rights according to Douglas. Lastly, he expressed concern over using atomic espionage as grounds for capital punishment when Congress had not explicitly defined it as such.