During a lawful car stop at a routine driver's license checkpoint, an officer of the Fort Worth (Texas) police observed a knotted party balloon in an automobile driven by Brown. Because of previous experience with drug offenders, the officer was aware that narcotics frequently are packaged in balloons. The officer instructed Brown to get out of his car after being told he had no driver's license and then reached into the car and picked up the balloon. After discovering the balloon contained a white powder, the driver was arrested. At the suppression hearing, a police department chemist testified that the substance in the balloon was heroin and that narcotics frequently are packaged in party balloons. Brown was convicted of unlawful possession of heroin, but the Texas Court of Criminal Appeals reversed the conviction, holding that the evidence should have been suppressed, because it was obtained in violation of the fourth amendment. The Supreme Court reversed the appeals court, holding that the officer had probable cause to believe that the balloon contained illicit substances, based on his experience with narcotics arrests, and this was sufficient justification for seizure. Accompanying the video is a booklet that summarizes the incident and the case's progress through the courts and that explains the rationale for the Supreme Court's decision.