HKSAR v. YIM YU HANG AND OTHERS

HKSAR v. YIM YU HANG AND OTHERS

Where prosecution proves chain of custody and reliability of the end devices that produced and stored WhatsApp records by combining end-user testimony and credible digital-forensics evidence, those records are admissible without s.22A certificates; prosecution need not prove every intermediary computer in transmission chain; however messages remain hearsay unless they fall within exceptions (declaration against interest or co-conspirator rule), and the court must guard against undue prejudice including by severance when necessary.

Citation
[2020] HKCFI 2570
Parties
Prosecution: HKSAR; 1st Defendant: Yim Yu Hang; 2nd Defendant: Chow Ching Yin; 3rd Defendant: Wong Wai Ho
Court
Court of First Instance
Jurisdiction
Hong Kong
Judgment Date
9 April 2019
Case Number
HCCC149/2018
Procedural Posture
Criminal (murder and Related Offences) / Pre Trial Voir Dire on Admissibility of Electronic Evidence; Ruling and Severance Order
Outcome
Court admitted specified WhatsApp messages from Lee's iPhone and D3's HTC phone either as declarations against interest or for non-hearsay use as detailed in the ruling; trial of D1 and D2 severed from D3; publication of related proceedings prohibited until trial conclusion or further order.
Legal Topics
Hearsay, Admissibility of Electronic Communications, Section 22 a Evidence Ordinance, Declaration Against Interest, Co Conspirator Rule, Authentication and Authorship, Severance
Source Language
EN
Evidence Criminal Law Digital Forensics Criminal Procedure Hearsay Admissibility of Electronic Communications Section 22 a Evidence Ordinance Declaration Against Interest +3 more

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Parties

HKSAR

Prosecution

Yim Yu Hang

1st Defendant

Chow Ching Yin

2nd Defendant

Wong Wai Ho

3rd Defendant

Procedural Posture

Criminal (murder and Related Offences) / Pre Trial Voir Dire on Admissibility of Electronic Evidence; Ruling and Severance Order

Legal Issues

  1. 1 Whether WhatsApp messages extracted from mobile phones are admissible evidence without s.22A computer certificates
  2. 2 Whether such messages constitute hearsay or real evidence
  3. 3 Whether prosecution must prove all intermediary computers in transmission chain were functioning properly

Ratio Decidendi

Where prosecution proves chain of custody and reliability of the end devices that produced and stored WhatsApp records by combining end-user testimony and credible digital-forensics evidence, those records are admissible without s.22A certificates; prosecution need not prove every intermediary computer in transmission chain; however messages remain hearsay unless they fall within exceptions (declaration against interest or co-conspirator rule), and the court must guard against undue prejudice including by severance when necessary.

Court Disposition

Court admitted specified WhatsApp messages from Lee's iPhone and D3's HTC phone either as declarations against interest or for non-hearsay use as detailed in the ruling; trial of D1 and D2 severed from D3; publication of related proceedings prohibited until trial conclusion or further order.

Orders

  • Specific WhatsApp messages identified in the written ruling are admissible either as declaration against interest or for non-hearsay use as specified by the judge
  • The trial of the 1st and 2nd defendants (Yim Yu Hang and Chow Ching Yin) is severed from the trial of the 3rd defendant (Wong Wai Ho)