57 All of the matters which I have considered above are also relevant in my opinion to the issue of the reliability of the microcassette tape recording as an accurate record of the 21 May 1997 conversation. I adopt my analysis and findings concerning the issue of continuity in my analysis here in relation to the reliability of the recording.
58 In addition to those matters that I have already considered above, there are a number of other indications which in my opinion affect the reliability of the recording. There were, for example, discrepancies between the accounts given by the applicant and Mr Edlund of the conversation. There were also found to be discontinuities in the record of the conversation, for example, Mr Garde noted two discontinuity points (anomalies) at the end of the recording at the precise point where the threat was alleged to have been made.
59 The applicant in submissions points to numerous inconsistencies in the accounts given by both parties to the conversation. I intend to mention a few by way of illustration. First, the applicant said in a record of interview that during the conversation Mr Edlund's hands on occasion went in and out of the pockets of a leather jacket he was wearing. The applicant surmised from this activity that at the critical time when the threat was issued Mr Edlund may have put his hand over the microphone. Mr Edlund, on the other hand, maintains that he secreted the listening device inside an A-4 size black leather folder which he had either on his lap or had placed on the floor. Secondly, at the end of the conversation Mr Edlund said "Allright, thanks for talking to me". According to Mr Edlund he then opened the door in order to leave the room. He then saw Inspector Connor who greeted him. On the tape recording, however, no sound consistent with opening a door can be heard. This suggests, according to the applicant, that the recording had been edited at that point. Thirdly, there are two anomalies (discontinuities) appearing at the end of the conversation at the point where the applicant alleged he was threatened by Mr Edlund. Both these anomalies are described in the PIC report as "unintelligible", and in Mr Garde's transcript as "indistinct". Mr Garde conceded in cross-examination that he did not provide an explanation for the presence of the anomalies. Indeed, in his report he did not advert to them at all. Mr Garde's evidence was, however, that a discontinuity (identified in his transcript as "indistinct") in the recording may be indicative of a possible edit point. The gap in time between the words "Allright, thanks for talking to me" followed by the first discontinuity, and then the voice of Inspector Connor saying "John" is three seconds. The applicant submits that this was insufficient time for Mr Edlund to have walked from where he was standing in the office, open the door into the foyer area (at which point according to the applicant Mr Edlund lent backwards) and utter the implied threat.
60 Whether or not in this last mentioned illustration 3 seconds was sufficient time, it was in my view worthy of further investigation. It was an anomaly in the recording at the precise point when Mr Edlund was alleged to have uttered the critical words. It is unfortunate that Mr Garde's attention was not directed first to the fact that a threat was alleged to have been made during the conversation, and, secondly to that part of the recording where it was alleged to have been made. The presence of discontinuities in both the PIC and Garde transcripts may well have, if Mr Garde had been informed, been subjected to closer analysis. All of these matters to which I have referred in my consideration of the issues of continuity and reliability of the microcassette tape recording, including Mr Edlund's tampering (I use the word here in a neutral sense) of the recording on probably two occasions, should have alerted those persons investigating the allegations to the importance of adopting a cautious approach to the contents of the recording and of taking careful and precise steps to confirm its accuracy or otherwise.
61 The accuracy or authenticity of the recording could only be ascertained by experts in tape authentication, provided such persons were in receipt of the necessary instructions. In my opinion this did not happen. Mr Empson was not qualified to give an opinion on the authenticity of the recording and Mr Garde's analysis was unsatisfactory, in my view largely because his instructions were not sufficiently comprehensive. As a result the material before the Commissioner which formed the basis for the decision to remove the applicant was inadequate, in relation to the critical piece of evidence against the applicant.
62 I turn now to consider the evidence of Mr Empson and Mr Garde.
The expert evidence