<P> The caution in England and Wales does not explicitly require that a suspect affirm they understand the caution . In addition the caution need not be explicitly stated if it is obvious that the suspect is already aware of his rights, for example if he is a police officer, as long as the suspect is definitely aware that he is under caution . Furthermore, the invoking of that right does not prohibit officers from asking further questions . </P> <P> Warnings regarding the right against self - incrimination may have originated in England and Wales . In 1912, the judges of the King's Bench issued the Judges' Rules . These provided that, when a police member had admissible evidence to suspect a person of an offence and wished to question that suspect about an offence, the officer should first caution the person that he was entitled to remain silent . However, the warning about the possibility of anything the male suspect said being potentially used against him predates even that: it appears for example in Sir Arthur Conan Doyle's novel A Study in Scarlet, published in 1887: </P> <P> "The official was a white - faced unemotional man, who went through his duties in a dull mechanical way . "The prisoner will be put before the magistrates in the course of the week," he said; "in the mean time, Mr. Jefferson Hope, have you anything that you wish to say? I must warn you that your words will be taken down, and may be used against you ." </P> <P> "I've got a good deal to say," our prisoner said slowly . "I want to tell you gentlemen all about it ." </P>

Do i have the right to remain silent in canada