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Her Honour concluded that the officers were not knowingly concerned in the importation of cocaine. This finding of fact was open to her Honour. She added :-
'Had I formed the view that the officers had been knowingly concerned in the importation of cocaine, I am of the opinion that the illegal conduct of the officers would fall within the first category identified in Ridgeway (supra) and in which the decision to admit the evidence needs to be considered against those matters contained within s.138 of the Evidence Act. Without gong to the necessity of listing those factors, I am satisfied that the desirability of admitting the evidence outweighs the undesirability of admitting it.'
This passage of her Honour's reasons is attacked as a mere assertion, in breach of her Honour's obligation to provide proper reasons. There is some force in this criticism. However, in the light of her Honour's outline of the facts and submissions earlier in the judgment, it is reasonably clear which are the matters which she took into account.
Her Honour was dealing with a submission to the effect but for the involvement of the officers there would have been no importation. In submissions in this Court it was suggested that her Honour fell into error and that the real question was 'Whether but for the actions of the officers the offence with which the appellant has been charged would have taken place?'. Nothing in the evidence before the trial judge, nor in this Court, suggests that any act of the informer or the undercover officers involved in this matter, played any material role in the conduct of the Appellant. The basis on which the alleged improper or illegal activity on the part of the officers could have had an effect on the involvement of the Appellant was that, without such official involvement, there would have been no importation at all.
There was an absence of precision, both before her Honour or in this Court, as to what evidence it was which ought to have been excluded. The focus of the allegations of illegality and impropriety were on the act of importation. The other matters referred to were the acquisition of chemicals needed to extract the cocaine from the plastic folders and the steps taken preparatory to extraction. However, even if all the evidence associated with the acquisition or the use of the chemicals had been excluded, that would not have fundamentally undermined the case against the Appellant who was charged with being knowingly concerned in the act of importation. In the absence of any evidence from the Appellant or anyone associated with his defence, the Court cannot speculate about what, if any, effect on his plea may have been occasioned if there had ever been a separate objection to the admissibility of evidence in relation to the acquisition of chemicals and the preparatory steps.
On the evidence before the trial judge and this Court, an informer on behalf of the National Crime Authority had engaged in a process of subterfuge with Castro-Vargas who wished to export cocaine to Australia from Columbia. The process included a number of different aspects, including the provision of addresses for the delivery of cocaine parcels, the payment of moneys, the assertion of the existence of a safe distributor, meeting agents of the exporter and the introduction of other undercover agents of the NCA who, in turn, supplied, at the request of those criminally involved, the specific chemicals required to remove the impregnated cocaine. The involvement was, in many respects, tangential and the encouragement, in so far as there was encouragement, was of a minor order.
None of the conduct complained of on behalf of the authorities in this case, in my opinion, breaches a standard of impropriety, let alone of illegality, to a significant degree, if at all. Her Honour was entitled to find, as she did find, that even without any official conduct, there would have been an importation. As the officer-in-charge of the investigation, a Mr Michael Purchas, said in his evidence:-
'Cocaine was going to be sent regardless. The idea was to make sure that we associated ourselves enough with the group that we knew where it was to be sent and we were in a position to seize it and to arrest them.'
Her Honour was correct to find that this was the character of the involvement. The extent of the encouragement by the authorities through the informer and other involvement was, at the highest, of a low level. I am unable to discern an impropriety or contravention of Australian law to a degree which would justify the exclusion of the evidence. In the circumstances, there is no basis for interfering with her Honour's decision to balance in favour of admission, the desirability of admitting the evidence against any undesirability associated with the way in which the evidence was obtained. Accordingly, I am unable to detect undesirability to the relevant extent which would justify excluding the evidence or interfering with the exercise of the discretion under s.138 by her Honour." (emphasis added)
62 The Court of Criminal Appeal accordingly determined that:-
(a) there was a valid certificate under s.15M and the relevant acts of the authorities with respect to the importation and handling of cocaine were covered by a valid certificate;
(b) any impropriety or contravention of Australian law was not to a degree which would justify the exclusion of the evidence; and,
(c) there was no suggestion that the applicant was innocent of the offence.