Ground 3: The learned trial judge failed to fully and fairly leave the defence case to the jury.
20 These grounds of appeal were dealt with together by the appellant. The substance of the submissions was that objection had been taken at trial to the evidence of Ms Burger. The objection at trial related to the continuity of custody of the exhibits and the integrity of the material forming the basis for the expression of the likelihood ratio. It was submitted that the latter basis included the fact that four analysts had carried out tests on the underpants, their results then being given to Ms Burger for an interpretation, but those analysts were not called. It was submitted that in those circumstances Ms Burger should not have been allowed to give evidence since she had nothing to do with the processes which produced the analyses upon which she based her opinion.
21 It was submitted that allowing this evidence was unfair to the appellant since his counsel could not test the evidence of those analysts who were not called. This had produced a fundamental injustice such as was referred to in R v Sing (2002) 54 NSWLR 31 at [34-35]. There Hodgson JA, with whom Levine and Howie JJ agreed, said:
"34 Whatever is the correct answer to the hearsay question, I think there is substance in the appellant's complaint that to admit evidence like that of Mr Weigner and/or Mr Goetz over objection, without the evidence from the persons who actually carried out the procedures that resulted in the print-outs, and indeed without any evidence that there was any difficulty in calling these persons, involved unfair prejudice to the appellant. It may be that these persons would have no recollection of exactly what they did and would have to rely on records; but that is not generally sufficient justification for not calling, in a criminal prosecution, a witness involved directly in a significant part of the prosecution case.
35 Counsel for the appellant at the trial said he had an expert present in court for the purpose of assisting him with questions to be put to the persons who actually carried out the procedures, and I think this Court should proceed on the basis that there were relevant questions which the appellant's counsel wished to put to these persons if they had been called. There is an obligation on the prosecution to call available witnesses of events alleged to constitute the offence and of essential parts of the prosecution case, at least unless there is some justification for not doing so: see for example R v Kneebone (1999) 47 NSWLR 450. I think this does extend to witnesses such as those in this case dealing with important links in the prosecution case. Particularly since DNA evidence can be so compelling, I do not think the matter of the correct carrying out of testing procedures should normally be proved, over objection, merely by evidence of the existence of the procedures and the giving of instructions, and otherwise left to inference. If for any reason the persons who actually did the work are unavailable, there may be justification for such a course. But there is no suggestion of that here."
22 It was submitted that allowing the evidence of Ms Burger without also calling the evidence of the analysts, who had carried out the tests upon which her opinion was based, contradicted the principle in Makita (Australia) Pty Limited v Sprowles (2001) 52 NSWLR 705, ie that the facts underlying the opinion had not been proved.
23 Certificates from the analysts had been served pursuant to s177 of the Evidence Act. No written notice was given by the appellant before the commencement of the trial that objection would be taken to those certificates. The first indication that there may be such an objection occurred at the commencement of the trial during the opening by the Crown when defence counsel indicated there would be objection to the DNA evidence. Formal objection to the analysts' certificates was not made by defence counsel until day six of the trial (T.171). Objection was taken to the tender of the certificates before the evidence of Ms Burger was taken.
24 Contrary to the submissions of behalf of the appellant I am not persuaded that any objection was taken to the scientific processes used by the analysts to produce the results relied upon by Ms Burger. At all times the objection taken related to the continuity of the custody of the exhibits, in the context of those exhibits being contaminated in some fashion while being processed in the laboratory. There was never any challenge to the methodology of the analysis and the scientific processes used in relation thereto. This is clear from a number of exchanges between defence counsel and the trial judge:
"Defence counsel: Your Honour in relation to the DNA sample taken from the accused, there was evidence given by the various persons, Constable Thomas, the people from TNT in relation to the transport to the laboratories and Eric Hagarty from TNT handed the TNT Failsafe bag to the lady analyst Kavianifir, who says she put it into a tray. We don't know what happened from that point on until the material was analysed by this witness and the same applies to the DNA sample from EP, when Mr Hagarty on 2nd September 2003 does much the same thing. He hands it to a person known as R Woods. We don't know what happened to it after that. In respect of the clothing your Honour the evidence of Virginia Friedman, analyst from the laboratory, she said that not only did she handle the clothing, but there was also a person named Nguyen, a person named Griffith, a person named Stacey and there's just no evidence as to how it came into the hands of the analyst your Honour."
"Defence counsel: After it reaches the laboratories, between when it reaches the laboratories, there's no evidence about what happened to it after that or who's responsible for the - we've got names of these other three persons who dealt with the exhibit and there's just no evidence of it. I think that applies to the two DNA samples and the clothing where other persons - it's in the report your Honour - and other persons assisted in the processing and analysis of the items."
…
"Defence counsel: Your Honour the chain of possession is not complete. The exhibits turn up at the laboratories but there is no evidence at all between then and when the analysis is carried out."