In the case of Jackson et al. v. United States (1963), the Supreme Court ruled on a matter concerning jury selection in Washington D.C. The appellants, who were African American, argued that they had been discriminated against during their trial because no black persons were included in the grand or petit juries due to systematic exclusion by jury commissioners. They contended this violated their Fifth Amendment right to a fair trial and equal protection under law. The court held that while there was evidence of racial disparity in jury composition, it did not necessarily prove discrimination as other factors could have caused this imbalance such as age, economic status etc., which are also valid considerations for juror eligibility and selection. However, Justice Hugo Black dissented arguing that even if unintentional bias existed within these processes it still resulted in an unfair system where black defendants faced all-white juries - thus violating constitutional rights regardless of intent behind actions taken by officials involved with juror selections.

In the dissenting opinion for Jackson et al. v. United States, Justice Douglas argued that the majority's decision was a departure from established precedent regarding entrapment. He contended that when government agents plant an illegal idea in someone's mind and induce them to commit a crime they would not have otherwise committed, it constitutes entrapment - regardless of their previous criminal record or predisposition towards committing such crimes. According to him, this view is consistent with earlier Supreme Court rulings which held that courts must look at whether the crime originated with law enforcement officials rather than simply focusing on the defendant’s propensity to commit it. The justice further criticized the majority for shifting focus onto defendants' characters instead of scrutinizing police conduct during investigations.