As their Honours explained ( Tofilau , at [58]) the "criteria that … found the legal conclusion that a confession was not made 'voluntarily'… [a]ll are species of compulsion".
188 Gummow and Hayne JJ (Tofilau, at [59]) distinguished cases of statements preceded by an inducement held out by a person in authority from confessions in which a person in authority has so acted as to engage the principle of basal voluntariness. In the latter case, they pointed out "if a person in authority subjects a suspect to coercion, whether by threats of violence or other intimidatory acts, the rule excluding a confession made to a person in authority in response to an inducement is readily applied". In cases of confessions made under compulsion their Honours said (at [60], footnotes omitted):
" The key inquiry is about the quality of the compulsion that is said to have overborne the free choice of whether to speak or to remain silent. In this context, 'overborne' should be understood in the sense described by Dixon J as 'the result of duress, intimidation, persistent importunity, or sustained or undue insistence or pressure'. It is necessary to focus upon the sufficiency of the compulsion ." (emphasis added)
189 Callinan, Heydon and Crennan JJ also pointed out (Tofilau, at [287]) that the traditional English approach to excluding confessions eschewed "an inquiry into the accused's mental processes … in order to examine whether the inducement did stimulate the flattery of hope or the torture of fear, and whether it was the flattery or the torture, as distinct from some other cause, which forced the confession from the accused's mind". The consequence was (footnotes omitted):
"…that very small inducements were fatal… A small selection from a huge field of examples would include: 'It will be the right thing ... to make a clean breast of it'; 'I think it might be better if you made a statement and told me exactly what happened'; 'Put your cards on the table. Tell them the lot'; 'You had better tell the truth' ".
190 Callinan, Heydon and Crennan JJ examined (at [329] ff) what constituted oppression under English common law. In R v Priestley (1965) 51 Cr App R 1, Sachs J described it as "something which tends to sap, and has sapped, that free will which must exist before a confession is voluntary", a description which accords with Dixon J's statement in McDermott of confessions made by a person whose will was overborne of which he gave non-exhaustive illustrations: Tofilau (at [330] - [331], [364]).
191 At common law it is not necessary, before a statement is held to be inadmissible because it is not shown to have been voluntary, that the relevant impropriety be found in the conduct of the person to whom the statement was made. Rather, what has to be considered, is whether the statement is shown to have been voluntary: DPP v Ping Lin [1976] AC 574 (at 594) per Lord Morris of Borth-y-Gest (Lord Wilberforce agreeing) and (at 602) Lord Hailsham. As was explained in R v Bertrand [2008] VSCA 182; (2008) 20 VR 222 (at [50]), Lin emphasised that the question of the admissibility of a confession turned on the application of common sense, and the recognition "that the main reason for receiving a confession was that if made freely, it was very probably true." Thus it would be sufficient, in accordance with Lin, to reject a confession if it was elicited after the accused had been subjected to relevant oppressive conduct, even if those to whom the confession was made were not complicit in that conduct, as long as the court could conclude the conduct was a cause of the confession being made.
192 Burut v Public Prosecutor [1995] 2 AC 579 (Privy Council) is a decision to like effect. The accused were suspected of a firearms offence (which was a capital offence) and in accordance with a "special procedure" for such cases, were manacled and hooded during some of their interviews. However, they made their confessions, not during those interviews, but in interviews during which they had not been manacled or hooded. At their trial the accused contended that their statements were inadmissible under s 117 of the Criminal Procedure Code of the Laws of Brunei (Cap 7) because in the circumstances in which they were obtained the prosecution would not be able to satisfy the court, as it was required to do under s 117(2), that "the statement was voluntary, that is to say that it was not obtained by violence, inducement, threat or oppression by a person in authority". The accused did not give evidence on the voir dire conducted to determine the admissibility of the confessions. Lord Steyn, who delivered the advice of their Lordships, held (at 593):
"For the police to interview an arrested person while he is manacled and hooded is plainly oppressive conduct calculated to sap the will of the person being interviewed."
193 Lord Steyn then turned to the question whether the confessions were "obtained by … oppression". He emphasised that an inference could be drawn from the circumstances of the oppressive conduct, that the confessions may have been obtained by oppression, saying (at 593):
"In the gaps between the application of the 'special procedure' and the signing of the written statements the appellants were questioned by police officers. As their Lordships have observed virtually nothing is known about those interviews. Moreover, during those gaps the appellants remained deprived of visits of relatives. Nothing had happened to remove the implied threat of further sessions subject to the 'special procedure.' The trial court misdirected itself by finding that in the absence of oral evidence from the appellants on the voir dire there was no evidence that the statements were obtained by oppression. Even without evidence from the appellants the very nature of the 'special procedure,' and the relatively short gaps between the application of the 'special procedure' and the taking of the statements, inferentially suggested that the statements were, or may have been, obtained by oppression. In these circumstances their Lordships are free to depart from the findings of fact of the trial court. The correct conclusion is that, against the background of the 'special procedure,' the prosecution upon whom the burden rested failed to prove to the requisite standard that the statements were not obtained by oppression. It follows that the trial court should have ruled all the written statements inadmissible." (emphasis added)
194 In R v Thomas [2006] VSCA 165; (2006) 14 VR 475 (at [83]), the Court of Appeal (Maxwell P, Buchanan and Vincent JJA) also took the view that the question of voluntariness was to be determined by assessing whether any relevant impropriety was likely to have been operating upon the mind of the accused at the time he was interviewed. In Thomas, the accused was arrested in Pakistan, held by Pakistani authorities for two months in solitary confinement and interviewed by Pakistani authorities and on six occasions by members of a joint team of Australian Federal Police and ASIO officers. In holding statements he made should have been ruled to be inadmissible at trial, the Court said:
"91 What is important is whether the applicant could, in any real sense, be said to have had a free choice to speak or remain silent. In our view, the Judge fell into error by divorcing the interview from the context in which it occurred, a context which his Honour found operated on the will of the applicant. It is necessary, when considering the admissibility of an inculpatory statement made by a person in the course of a police interview, to bear in mind that evidence of this kind differs from most other forms of evidence. The most obvious difference, which has long been identified and to a large extent underlies the principles governing the admissibility of such evidence, is that the evidence comes into existence at the time of the interview and is a product not only of the interview itself but of many factors, both external and personal to the maker. Whether or not an individual decides to speak or remain silent, and the content and form of any statement made, will inevitably be influenced by his perception of the situation in which he is placed at that time ." (emphasis added)
195 The Court concluded (at [92]), that "[w]hile nothing occurred in the interview itself that could be seen to overbear the will of the applicant, there can be little doubt he was, at that time, subject to externally-imposed pressure of a kind calculated to overbear his will and thereby restrict, in a practical sense, his available choices and the manner of their exercise" and (at [94]) that "[a]dmissions made in the circumstances we have described could not, in our view, be held to be voluntary".
Section 84 - legislative history
196 The Evidence Act derives from an extensive inquiry into the laws of evidence conducted by the ALRC. The ALRC's Interim Report on Evidence (ALRC, Interim Report on Evidence (1985) No 26, Vol 1, at pars 752-766) noted many criticisms of the voluntariness rule, one of which was that it attempted to address both reliability and public interest concerns but failed adequately to distinguish between them (at par 965).
197 Clause 71 in the draft Evidence Bill attached to the Interim Report (Vol 2, at 40), included the presumption against admissibility contained in the present s 84:
"71. Evidence of an admission is not admissible unless the court is satisfied that the admission, and the making of the admission, were not influenced by violent, oppressive, inhuman or degrading conduct, whether toward the person who made the admission or toward some other person, or by a threat of conduct of that kind"
198 The ALRC explained the philosophy behind the proposal as follows (Vol 1, at par 765):
"Techniques which are perceived as particularly likely to substantially impair the mental freedom of a suspect may be prohibited, and any evidence produced as a result of them excluded. If interrogators engage in acts of violence, threats of violence, torture or inhuman, degrading or oppressive conduct, then an admission made subsequent to such conduct may be untrue, regardless of the characteristics of the suspect being interrogated."
199 The Evidence Act was based on the draft Evidence Bill attached to the ALRC's Final Report on Evidence (1987) No 38, Vol 1. Section 84(1) was cl 72 of the draft bill. The ALRC observed in relation to that clause (Summary of Recommendations, at par 34):
"34. Violence and admissions . Evidence of an admission should be excluded where it was influenced by violence to any person. It should not be necessary to establish a causal link between the violence and the admission (para 154(a); Bill, cl72)."
200 Paragraph 154(a) stated:
"154. Interim Report proposals. Some exclusionary rules were proposed. Two of these proposals were to apply in both civil and criminal proceedings.
(a) Violence and admissions. Evidence of an admission should be excluded unless the court is satisfied that the admission was not influenced by violent, aggressive, inhuman or degrading conduct to any person…."
201 The Final Report on Evidence dealt with deficiencies of the common law voluntariness rule. It observed (at [156], footnotes omitted):
"● There is also a vast body of technical and unclear law dealing with the admissibility of a confession induced by threats or promises by a person in authority. Fine distinctions have been drawn. For example, 'Be sure to tell the truth', is not a threat or promise that should exclude a confession but 'It would be better for you to tell the truth' is. It is unclear whether the inducement must actually cause the confession or whether it is sufficient that the inducement preceded the confession and was not removed .
The result in practice has been that attention tends to focus on whether the accused was overborne in some way or whether threats or promises were made. In practice, unless the accused can demonstrate that he or she was overborne, or that inducements were offered by a person in authority, the accused will fail to have a court rule a confession involuntary. Thus, while the onus of proving voluntariness is formally on the prosecution, in practice there is a subtle reversal of the onus - it is placed on the accused. This means that, in particular where psychological pressure is relied upon, it is extremely difficult for an attack on a confession on the grounds of involuntariness to be successful. The tendency is to admit rather than the exclude." (emphasis added)
202 The Final Report (at [157]) noted that an attempt was made to address a number of these criticisms, but in the end found that not to be possible and the decision was made to adopt the Interim Report approach.
203 In June 1988, the New South Wales Law Reform Commission released its Report on Evidence (June 1988) No 56, in which it adopted without amendment most of the ALRC's proposed Evidence Bill including cl 72.
204 In 1991, the New South Wales Attorney General introduced the Evidence Bill 1991 into the Legislative Council for the purpose of exposing it for public consideration and comment, based "substantially upon the recommendations of the Australian Law Reform Commission and the New South Wales Law Reform Commission": New South Wales Legislative Council, Parliamentary Debates (Hansard), 20 March 1991 (at 1436).
205 The Commonwealth followed suit, introducing its own exposure draft into the Federal Parliament in October 1991: Evidence Bill 1991 (Cth). In August 1993 a further exposure draft bill was introduced in New South Wales to obtain further comments. These exposure drafts made no significant alterations to cl 72 in the ALRC draft Evidence Bill.
206 The final Commonwealth Evidence Bill was introduced in the House of Representatives in December 1993. It represented a text which was agreed between New South Wales and the Commonwealth, taking into account comments made on the New South Wales exposure draft. Relevantly, it added a new subsection to cl 72 of the ALRC draft Evidence Bill, in the terms of s 84(2). Nothing in the Explanatory Memorandum to the Evidence Bill 1993 (Cth), or the Second Reading Speech, explains the genesis of this development.
207 In the Second Reading Speech for the Evidence Bill, the Minister for Justice, the Hon J W Shaw MLC noted that one of the aims of the Bill was to combine the "primary objectives of the volunteering rule - maximising the probability of the truth of the admission and the preservation of the rights of the individual suspect": New South Wales Legislative Council, Parliamentary Debates (Hansard), 24 May 1995, at 116.