Clawson v. United States was a Supreme Court case that addressed the issue of whether a defendant could be convicted of a crime if the evidence presented was obtained through an illegal search and seizure. The case involved a man named Clawson who was charged with selling liquor without a license. The evidence used to convict him was obtained through a search of his home without a warrant. The Supreme Court ruled that the evidence obtained through the illegal search and seizure was inadmissible in court and that Clawson could not be convicted on the basis of it. The Court held that the Fourth Amendment of the Constitution protects citizens from unreasonable searches and seizures and that any evidence obtained through such searches and seizures is inadmissible in court. The Court also held that the exclusionary rule applies to all federal courts and that any evidence obtained through an illegal search and seizure must be excluded from trial. The Court's ruling in Clawson v. United States established the precedent that evidence obtained through an illegal search and seizure is inadmissible in court and that the exclusionary rule applies to all federal courts. This ruling has been used in numerous cases since then to protect citizens from unreasonable searches and seizures.

Justice Field delivered the dissenting opinion in Clawson v. United States, arguing that the majority's decision was inconsistent with prior Supreme Court decisions and failed to recognize a fundamental principle of criminal law. He argued that Congress had not intended for an individual to be convicted of two separate offenses based on one act or transaction, as it would lead to double jeopardy and punishment for the same offense twice. Furthermore, he noted that if such a conviction were allowed under this case then any person who committed multiple acts within one transaction could be punished more severely than someone who only committed one act within said transaction - which is contrary to established legal principles. Justice Field concluded by stating his belief that Congress did not intend for individuals charged with violating Section 5209 of the Revised Statutes (the statute at issue) to face additional charges related solely because they acted in concert with another person during their violation; rather, each should have been held accountable only once regardless of how many people participated in committing the crime.