Wenshan has a reputation as a criminal lawyer.

The US Federal Bureau of Investigation is the Federal Bureau of Investigation (FBI), which is the main investigation method of the US Department of Justice. According to Article 28, Section 533 of the United States Code, the Attorney General is authorized to "appoint officials to investigate crimes against the United States", and other federal laws and regulations give the FBI the power and responsibility to investigate specific crimes. The existing investigation authority of the FBI has exceeded 200 federal crimes. The list of the top ten most wanted criminals has been made public since 1930.

The task of the FBI is to investigate violations of federal crime laws and support the law. Protect the United States from investigating intelligence and terrorist activities from foreign countries, provide assistance to federal, state, local and international agencies in leadership and law enforcement, and perform their duties on the premise of responding to public needs and being loyal to the US Constitution.

Every time the FBI investigates intelligence information, it will submit it to the appropriate American lawyers or officials of the US Department of Justice, who will decide whether to approve the prosecution or other actions. Among them, five aspects that affect society enjoy the highest priority: anti-atrocities, drugs/organized crime, foreign anti-espionage activities, violent crimes and white-collar crimes.

The FBI once had a disgraceful history of supporting the law and sometimes even breaking it. But in the usual impression of most Americans: it is the most effective institution to fight crime. The number of agents is increasing every year, and now it has exceeded 1 1 000 members. Most of the agents are stationed in foreign countries, working in the American embassy, and serving as the ambassador's legal commissioner. The FBI calls itself "LEGATS".

The CIA Central Intelligence Agency (hereinafter referred to as the CIA, commonly known as the company) is the largest intelligence agency in the United States (the spy and counterintelligence agency of the US government, and the general coordinator of the huge intelligence system in the United States). Its main task is to openly and secretly collect and analyze information about foreign governments, companies and individuals. Political, cultural, scientific and technological information, coordinate the activities of other domestic intelligence agencies, and report this information to the work of various departments of the US government. It is also responsible for maintaining a large number of military equipment, which was used to overthrow foreign governments during the Cold War, such as the former Soviet Union, and rivals that threatened American interests, such as Abens in Guatemala and Allende in Chile. Headquartered in Langley, Virginia. Some people think that the CIA often carries out assassination activities to assassinate enemy leaders, such as Cuban President Castro, but there is not enough evidence to prove this. The status and role of the Central Intelligence Agency is equivalent to that of Britain's MI 6 and Israel's Mossad.