In the case of United States v. Goldman et al., 1927, the Supreme Court considered whether a conspiracy to commit an offense against the United States had been established by evidence that showed defendants' participation in meetings where violent overthrow of government was discussed. The defendants were members of two organizations advocating for communism and they attended meetings where plans for armed revolution were discussed. However, there was no direct evidence showing that they agreed to participate in such activities or took any concrete steps towards this goal. The court ruled in favor of the defendants, stating that mere presence at these meetings and even agreement with ideas presented did not constitute a criminal act under federal law unless it could be shown that they intended to take action on those beliefs. This decision upheld principles related to freedom of speech and association as protected by First Amendment rights.

In the dissenting opinion for United States v. Goldman et al., Justice Oliver Wendell Holmes disagreed with the majority's decision to uphold convictions based on evidence obtained through wiretapping. He argued that using such methods violated the Fourth Amendment, which protects against unreasonable searches and seizures. Holmes believed that wiretapping constituted an invasion of privacy and was therefore unconstitutional if conducted without a warrant or probable cause. He also expressed concern about potential abuses of power by law enforcement agencies if they were allowed to use these tactics unchecked, arguing it could lead to a police state where citizens' rights are routinely violated in the name of crime prevention or national security.