R v Patterson (No 5) [2024] NSWSC 457

R v Patterson (No 5) [2024] NSWSC 457

The accused's statements to Professor Greenberg about what led to his psychotic episode were admissible because Professor Greenberg's voir dire evidence established that they formed part of his reasoning process in distinguishing substance-induced psychotic disorder from schizophrenia or schizophreniform disorder, and no unfair prejudice sufficient for exclusion under s 137 was identified. Evidence tending to show the accused's drug use in custody was not admissible because the Justice Health note was ambiguous as to the timing and course of any drug use, which significantly undermined probative value, while the evidence carried a significant danger of unfair moral prejudice against the...

Jurisdiction
Australia
Judgment Date
19 April 2024
Procedural Posture
Criminal Trial for Murder / Procedural Rulings on Objections to Admissibility of Expert Evidence After Voir Dire
Outcome
The accused's statements to Professor Greenberg about the cause of his psychotic episode were admitted; evidence tending to show drug use by the accused in custody was excluded.
Legal Topics
['murder' 'expert Psychiatric Evidence' 'admissibility' 'relevance' 'probative Value and Unfair Prejudice' 'mental Health Defence' 'substantial Impairment']
['criminal Law' 'evidence'] ['murder' 'expert Psychiatric Evidence' 'admissibility' 'relevance' 'probative Value and Unfair Prejudice' 'mental Health Defence' 'substantial Impairment']

Case Brief

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Procedural Posture

Criminal Trial for Murder / Procedural Rulings on Objections to Admissibility of Expert Evidence After Voir Dire

Legal Issues

  1. 1 ["Whether evidence of the accused's statements to Professor Greenberg about the relationship between his drug use and his psychotic episode was relevant and admissible." "Whether the probative value of the accused's statements about the cause of his psychosis was outweighed by prejudicial effect under s 137 of the Evidence Act 1995 (NSW)." 'Whether evidence tending to show drug use by the accused in custody was admissible.' 'Whether evidence that the accused had not given up using drugs because he enjoyed taking them was admissible.']

Ratio Decidendi

The accused's statements to Professor Greenberg about what led to his psychotic episode were admissible because Professor Greenberg's voir dire evidence established that they formed part of his reasoning process in distinguishing substance-induced psychotic disorder from schizophrenia or schizophreniform disorder, and no unfair prejudice sufficient for exclusion under s 137 was identified. Evidence tending to show the accused's drug use in custody was not admissible because the Justice Health note was ambiguous as to the timing and course of any drug use, which significantly undermined probative value, while the evidence carried a significant danger of unfair moral prejudice against the...

Court Disposition

The accused's statements to Professor Greenberg about the cause of his psychotic episode were admitted; evidence tending to show drug use by the accused in custody was excluded.

Orders

  • ["The evidence of the accused's statements to Professor Greenberg as to what led to his psychotic episode were admissible." 'The evidence tending to show drug use by the accused in custody was not admissible.' 'Evidence that the accused had not given up using drugs because he enjoyed taking them would not be...