During their examination of a damaged package, employees of a private freight carrier observed a white powdery substance concealed in a tube inside the package. The employees did not reseal the package and notified the Drug Enforcement Administration (DEA). When a DEA agent arrived, he removed the tube from the box and the plastic bags from the tube, saw the white powder, opened the bags, removed a trace of the powder, subjected it to a field test, and determined it was cocaine. A warrant was obtained to search the place to which the package was addressed, and subsequent to execution of the warrant, the defendants were arrested. Defendants moved to suppress the evidence on the grounds that moved to suppress the evidence on the grounds that the warrant was the product of an illegal search and seizure. The U.S. Supreme Court held that the fourth amendment did not require the DEA agent to obtain a warrant, stating that the Federal agents did not infringe upon any constitutionally protected privacy interests that had not already been frustrated as a result of private conduct. It found that the DEA agent's removal of the plastic bags and visual inspection of their contents enabled him to learn nothing that had not previously been learned from the private search and that infringement caused by the field test was constitutionally reasonable. Accompanying the video is a booklet that summarizes the incident and the case's progress through the courts, as well as the rationale for the Supreme Court's decision.