In the case of Dyson, Chief of Police of Dallas, et al. v. Stein in 1970, the Supreme Court ruled on a matter concerning freedom of speech and assembly rights under the First Amendment. The dispute arose when members from an organization known as "The Committee to Combat Fascism" were denied permission by police officials to hold a public meeting at Dealey Plaza in Dallas due to concerns about potential violence or disorderly conduct that could occur during their gathering. The group sued for violation of their constitutional rights and won at both district court level and appeals court level before reaching the Supreme Court. The Supreme Court upheld these previous rulings favoring Stein's right to free speech and assembly despite potential risks associated with such gatherings. It was determined that denying permits based solely on content or anticipated reactions violated First Amendment protections unless there is clear evidence suggesting imminent danger or lawless action would result from said event.

In the dissenting opinion for Dyson, Chief of Police of Dallas, et al. v. Stein (1970), Justice Hugo Black argued that the majority's decision to strike down a Texas statute prohibiting picketing near courthouses was incorrect and could potentially jeopardize public order and safety. He contended that this law did not violate First Amendment rights as it only restricted location, not content or viewpoint of speech. Furthermore, he believed such restrictions were necessary to maintain peace around sensitive areas like courts where tensions can run high due to ongoing trials or verdicts being delivered. He also expressed concern about potential intimidation or influence on judges, jurors and witnesses by protestors if allowed in close proximity to court buildings.