The fresh evidence
11 Tendered on the appeal was an affidavit by the applicant describing his treatment by a Dr Singh, general practitioner, for ongoing depression, insomnia and drug and alcohol abuse. This affidavit contains much that was, in substance, before the sentencing judge. It contains the additional information that Dr Singh had prescribed Rivotril but that, after about a month, the applicant had started to increase his ingestion of that medication without informing Dr Singh that he was doing so and without his advice. The affidavit gives details about the effects of taking Rivotril on the day of the offence, claiming that he felt he was becoming drowsy and confused. He claimed that he was "extremely affected by the combination of drugs and alcohol…[and accordingly had] a limited memory of the evening…but I do remember feeling like my behaviour changed suddenly and for no reason". The applicant claimed that he had provided this information to his solicitors and requested that an expert's report be obtained. The date of these instructions is not stated but, as I read the affidavit, it seems to have occurred well after the applicant was sentenced and were given in the context of the proposed appeal. Other matters are referred to in the affidavit which do not call for comment.
12 The fresh evidence relied on is a report of Professor Starmer. This report deals generally with the effect of alcohol, cannabis and Rivotril. In particular, following a detailed discussion of the effect of Rivotril the report states -
"7.9 Unforeseeable reactions may occur when alcohol and clonazepam [i.e. Rivotril] are taken together. On rare occasions , when clonazepam has been taken with alcohol or other central nervous system-active drugs, the individual has manifested unusual or disturbed behaviour of which he/she has no later recollection. The spectrum of reported effects includes hallucinations, acute excitation, confusion, agitation, unusual dreams and sleep disturbances…
7.10 Occasionally benzodiazepines produce paradoxical stimulant effects and can provoke aggressive and hyperactive behaviour and exacerbate seizures in epileptics. Outbursts of rage and violent behaviour have also been reported after clonazepam, especially in anxious patients. These paradoxical effects have been attributed to dis-inhibition of behaviour which is normally suppressed by social restraints, fear or anxiety …" [Italics added.]
13 Professor Starmer's conclusion was that the "exact interactive consequences of his drug-taking" could not be predicted but that "the spectrum does include a possible paradoxical reaction to benzodiazepines [including Rivotril]" [italics added].
14 The Crown tendered a report by Dr Judith Perl, a pharmacologist from the Clinical Forensic Medicine Unit of the NSW Police Force which, in substance, did not dispute the opinion of Professor Starmer but pointed out that the most likely effect of the high dose of Rivotril claimed by the applicant to have been ingested on the day in question "would have been to produce significant sedation".
15 It was submitted by Mr Ramage QC that Professor Starmer's evidence - not sought to be controverted by Dr Perl - significantly supported his case that the violence inflicted on the applicant occurred when he had "snapped" and that this was caused or significantly contributed to by the unforeseen consequences of Rivotril ingestion. Since this is a matter which is relied on by the applicant in mitigation of the gravity of his offence, it was a matter which it was necessary to be proved on the balance of probabilities. The mere proof of a possibility, for obvious reasons, does not suffice. At the same time, it seems to me that the sentencing judge accepted that the applicant had "snapped". Even had the report of Professor Starmer been adduced before her, I do not think it could have provided an adequate evidentiary basis for concluding that this was, or probably was, the result of his having taken Rivotril. Moreover, this "snapping" was proffered as an explanation for the assaults occasioning actual bodily harm but not in mitigation of the production of the knife.
16 In my view, the evidence sought to be relied on is of such little cogency, having regard to the issues on sentence, that it ought not to be received and I would reject it.