After the arrest of former trump adviser Bannon, many netizens who read relevant news found that the law enforcement personnel who arrested ban Nong were actually from the United States postal service. According to US media reports such as the Washington Post, the arrest was completed by the U.S. Postal Bureau of investigation. On the day of the operation, the officers of the Postal Bureau of investigation, with the assistance of the coast guard, took a law enforcement boat to ban Nong and arrested him. During the British colonial period in 1737, Benjamin Franklin, the founder of the United States, was appointed postmaster general by the city government. At that time, the postal lines across the eastern and western parts of the United States were often subject to theft and robbery. Therefore, Franklin was determined to set up a postal law enforcement team. After the founding of the United States, this team was reorganized several times and became the current U.S. Postal Bureau of investigation. According to the official website, the Postal Bureau of investigation has participated in the investigation and cracking of many major historical cases, including the arrest of Billy boy, the legendary thief in the western United States, and the tracking of those purchased through the postal system in the Kennedy assassination case. At present, the Postal Bureau of investigation is recognized as the federal law enforcement department of the United States. Its officers and policemen can be equipped with firearms and other heavy weapons, and can apply for search warrant in law enforcement. According to relevant regulations, the Postal Bureau of investigation has the right to investigate the case and arrest the suspect. With regard to the arrest and the circumstances of the case, the Postal Bureau of investigation said its responsibility was to protect the U.S. Postal System and ensure that it was not used by criminal activities, but it did not directly respond to the details of the case.