R v MK [2012] NSWCCA 110

R v MK [2012] NSWCCA 110

The trial judge's exclusion of the DNA evidence miscarried because the decisive reasoning treated Y-filer frequency ratios of about 1 in 512 or 1 in 630 as inherently speculative, misleading and likely to be overvalued by a jury. In light of Aytugrul, properly and clearly explained DNA frequency evidence of that kind could assist and be understood by a jury. The judge therefore acted on wrong principle and a mistake as to the facts in applying ss 135 and 137, and the exclusion substantially weakened the Crown's circumstantial identification case.

Jurisdiction
Australia
Judgment Date
04 June 2012
Procedural Posture
Criminal Appeal Against Interlocutory Evidentiary Ruling / Appeal by the Crown Pursuant to S 5 F(3 A) of the Criminal Appeal Act 1912 From Judge Nicholson Sc's Exclusion of DNA Evidence After a Voir Dire
Outcome
Appeal allowed; the judgment of Judge Nicholson SC dated 19 March 2012 was set aside.
Legal Topics
['dna Evidence' 'y Filer Analysis' 'profiler Plus Analysis' 'identification Evidence' 'unfair Prejudice' 'misleading or Confusing Evidence' 'undue Waste of Time' 'interlocutory Prosecution Appeal']
['criminal Law' 'evidence' 'criminal Procedure'] ['dna Evidence' 'y Filer Analysis' 'profiler Plus Analysis' 'identification Evidence' 'unfair Prejudice' 'misleading or Confusing Evidence' 'undue Waste of Time' 'interlocutory Prosecution Appeal']

Case Brief

Summary, issues, holding and outcome

More case intelligence is available

Unlock the full research layer for this judgment.

Full judgment text Downloadable case file Legal principles 1 Authorities cited 2 Party arguments 2 Amounts and remedies 1
Sign in to unlock

Procedural Posture

Criminal Appeal Against Interlocutory Evidentiary Ruling / Appeal by the Crown Pursuant to S 5 F(3 A) of the Criminal Appeal Act 1912 From Judge Nicholson Sc's Exclusion of DNA Evidence After a Voir Dire

Legal Issues

  1. 1 ["Whether the trial judge erred in excluding the Crown's DNA evidence under ss 135 and 137 of the Evidence Act 1995." 'Whether Y-filer DNA frequency ratios in the range of 1 in 512 to 1 in 630 were misleading, speculative or unfairly prejudicial when used as circumstantial identification evidence.' 'Whether the exclusion of the DNA evidence eliminated or substantially weakened the prosecution case for the purposes of a Crown appeal under s 5F(3A) of the Criminal Appeal Act 1912.']

Ratio Decidendi

The trial judge's exclusion of the DNA evidence miscarried because the decisive reasoning treated Y-filer frequency ratios of about 1 in 512 or 1 in 630 as inherently speculative, misleading and likely to be overvalued by a jury. In light of Aytugrul, properly and clearly explained DNA frequency evidence of that kind could assist and be understood by a jury. The judge therefore acted on wrong principle and a mistake as to the facts in applying ss 135 and 137, and the exclusion substantially weakened the Crown's circumstantial identification case.

Court Disposition

Appeal allowed; the judgment of Judge Nicholson SC dated 19 March 2012 was set aside.

Orders

  • ['Appeal allowed.' 'The judgment of Judge Nicholson SC, dated 19 March 2012, be set aside.']