According to the relevant information, it is generally necessary for the police to ask for bank accounts, and it is the duty of every citizen to cooperate with the public security organs to investigate the situation. Even if citizens have not broken the law, they have the obligation to cooperate with the public security organs to assist in the investigation, and they cannot refuse the cooperation of the public security organs to assist in the investigation on the grounds that they have not violated the law. According to the relevant laws and regulations, the people's police perform their duties according to law and are protected by law, refusing or obstructing the people's police from performing their duties according to law.