But some relevant evidence is nevertheless inadmissible. To cite a famous passage from the opinion of Lord Herschell L.C. in Makin v. Attorney-General (N.S.W.) [39] : "It is undoubtedly not competent for the prosecution to adduce evidence tending to show that the accused has been guilty of criminal acts other than those covered in the indictment, for the purpose of leading to the conclusion that the accused is a person likely from his criminal conduct or character to have committed the offence for which he is being tried. On the other hand, the mere fact that the evidence adduced tends to show the commission of other crimes does not render it inadmissible if it is relevant to an issue before the jury, and it may be so relevant if it bears upon the question whether the acts alleged to constitute the crime charged in the indictment were designed or accidental, or to rebut a defence which would otherwise be open to the accused." That what was declared to be inadmissible in the first sentence of this passage is nevertheless relevant (i.e., logically probative) can be seen from numerous studies of offences in which recidivists are matched against first offenders, and by considering that it has never been doubted that evidence of motive (which can be viewed as propensity to commit the particular offence charged, in contradistinction to propensity to commit offences generally of the type charged) is relevant. All relevant evidence is prima facie admissible. The reason why the type of evidence referred to by Lord Herschell L.C. in the first sentence of the passage is inadmissible is, not because it is irrelevant, but because its logically probative significance is considered to be grossly outweighed by its prejudice to the accused, so that a fair trial is endangered if it is admitted; the law therefore exceptionally excludes this relevant evidence: whereas in the circumstances referred to in the second sentence the logically probative significance of the evidence is markedly greater. (See also Lord Moulton in R. v. Christie [40] .)
Wells J. understood that the speeches in Boardman were directed to "fostering a fair and sensible exercise of the Christie discretion", i.e., the discretion to exclude "evidence which, though admissible, would probably have a prejudicial influence on the minds of the jury which would be out of proportion to its true evidential value" (per Lord Moulton in R. v. Christie [41] ). On this approach, the starting point is the relevance of the similar fact evidence and thus its admissibility unless excluded in exercise of the Christie discretion. This approach focused upon what his Honour thought to be a "unifying" and "ancestral" principle stated in these terms:
Fundamentally, there is only one legal principle of evidence, and it is this: every item of evidence that is relevant to the issue - that is, that tends, of itself or in conjunction with other evidence, to prove or disprove a fact in issue - should be received and, quantum valeat, used for the purpose of that proof or disproof, unless some positive rule of law, based on judicially formulated policy, or on statute, prohibits that use.
His Honour thought that a trial judge's approach to questions of admissibility should be to admit relevant evidence unless there is some applicable rule of exclusion:
Once a disputed item of evidence is held to be relevant, the judicial mind must turn to the question whether any rule exists, by virtue of which the disputed item should be excluded, notwithstanding its relevance.
This echoes what was said by Lord Goddard L.C.J. in R. v. Sims [42] :
If one starts with the assumption that all evidence tending to show a disposition towards a particular crime must be excluded unless justified, then the justification of evidence of this kind is that it tends to rebut a defence otherwise open to the accused; but if one starts with the general proposition that all evidence that is logically probative is admissible unless excluded, then evidence of this kind does not have to seek a justification but is admissible irrespective of the issues raised by the defence, and this we think is the correct view. It is plainly the sensible view.
That passage was criticized by the Privy Council inNoor Mohamed v. The King [43] , their Lordships approving the different approach taken by Kennedy J. in R. v. Bond [44] :
[I]f, as is plain, we have to recognize the existence of certain circumstances in which justice cannot be attained at the trial without a disclosure of prior offences, the utmost vigilance at least should be maintained in restricting the number of such cases, and in seeing that the general rule of the criminal law of England, which (to the credit, in my opinion, of English justice) excludes evidence of prior offences, is not broken or frittered away by the creation of novel and anomalous exceptions.
The criticism of Sims was accepted in Boardman [45] .
1. [1973] A.C. 729, at pp. 756-757.
2. [1975] A.C., at p. 451.
3. [1894] A.C., at p. 65.
4. [1914] A.C. 545, at pp. 559, 560.
5. [1914] A.C., at p. 559.
6. [1946] 1 K.B. 531, at p. 539.
7. [1949] A.C. 182, at pp. 194-196.
8. [1906] 2 K.B. 389, at p. 398.
9. [1975] A.C., at pp. 440, 449, 456.