They are expected to know and obey the law. This is because they have the duty and responsibility to enforce it, and in order to enforce it they must have a keen knowledge of it themselves. If a law is said to be broken, it is the police who must first investigate the situation at the scene to determine the facts of the allegation. They act as officers of the law, and also as the more remote officers of the court, acting in the field.

In their investigations the police must obey the law. They may not use excessive force, nor mistreat the people they interrogate. Suspects cannot be held more than 24 hours, and they must not be mentally or physically abused while in custody. To avoid mistreatment of those who are brought into custody, the police are given extensive training. It is this training that the citizens rely on for their protection, and which provides a sense of security against the anti-social members of the general public.

To aid them in facing the criminal elements the police are allowed to carry weapons. The weapons, however, must not be used unless there is a clear threat of danger. Police should not use the guns to kill innocent and unarmed people. It is never necessary to execute people by shooting them in the head at close range while they stand with their hands up pleading for their lives. Policemen who use their weapons in this manner are not police officers. They are executioners.

The police must not allow themselves to be used by those in authority to perpetrate fictitious events. They must not perjure themselves when giving testimony about the facts of a case. They must always adhere to the truth, even when it reveals unpleasant and embarrassing policies in practice.

The police must not allow themselves to be used in furtherance of political schemes. When political foes are in opposition, the officers of the law must resist the pressures of those in authority to manufacture evidence, and provide witnesses who have been bribed. The police must not torture innocent people, by psychological abuse, or threats. The extraction of confessions after extreme duress is not a proper function of the police officer. By these acts the police officer becomes a criminal.

The police must be vigilant to protect society from the misuse of authority. When a witness is brought forward who is clearly of limited mental ability, and who has not sufficient education to be able to read and write, the testimony of this witness must be discounted. When the prosecution of a case rests solely on the testimony of such a witness, it is clear to all, police, prosecutor and judge, that the witness is being used as a cat's paw. The witness is being used by the authority as a dupe, unaware of the nature of the role he plays.

In Malaysia, in the case of Anwar Ibrahim there was a sole witness, brought forward by the prosecution to give testimony. When this testimony exonerated the accused, the prosecution excused themselves. The prosecution stated that the testimony was from a witness who was of "low I.Q. and with little education."