James Zjalić

James Zjalić is an experienced forensic multimedia expert specialising in the authentication, enhancement and analysis of digital audio and video. They provide expert witness services for criminal and civil proceedings throughout the UK.

• PhD Candidate researching the evaluation of multimedia authenticity examinations

• Master’s Degree in Media Forensics

• 1st Class Bachelor’s Degree with Honours in Audio Engineering

• Co-Paper Chairman for the Audio Engineering Society’s 2024 Audio Forensics Conference (2024)

• Co-Chairman of the Audio Engineering Society’s Technical Committee for Audio Forensics (2023 – Present)

• Technical Field Advisor to Foclar (2017 – Present)

• Technical Audio Forensics Consultant for the BBC drama series ‘Exemplar’ (2022)

• Remote Research Assistant for the DARPA ‘Medifor’ Project (2016 - 2017)

• Zjalić, J. (2020) Audio Forensics Fundamentals: From Capture to Courtroom, Taylor & Francis, London, UK

• Zjalić, J. (2025) The Application of Likelihood Ratios to Audio Authentications: Selected Preliminary Results, AAFS Annual Conference 2025, Baltimore, USA

• Pottage, K., Zjalić, J. (2025) A Facial Perspective Atlas: A Tool to Assist Morphological Facial Comparisons, AAFS Annual Conference 2025, Baltimore, USA

• Zjalić, J. (2024) A Homogeneity Study of the LTASS Measurand, AES Audio Forensics 2024, Denver, Colorado

• Zjalić, J. (2022) The Validation of Imagery Enhancement Operations, AAFS Annual Conference 2022, Seattle, USA

• Grigoras, C., Koenig, B.E., Lacey, D.S, Smith, J.M., Whitecotton, C., Zjalić, J. (2021) A Forensic Analysis of Digital Speech Standard (DSS) Files, AAFS Annual Conference 2021

• Lomboy, G., Whitecotton, C., Zjalić, J. (2021) A Study of Video Conferencing Software from an Authentication Perspective, AAFS Annual Conference 2021

• Lomboy, G., Zjalić, J. (2020) The Use of On-Screen Time Display for Authentication of Videos Captured using Body-Worn Cameras, AAFS Conference 2020, Anaheim, CA, USA

• Zjalić, J. (2021) An Acceptable Resolution for the Analysis of Knives Captured within CCTV Imagery, AAFS Conference 2020, Anaheim, CA, USA

• Zjalić, J. (2019) Detection of In-App Apple Voice Memos Edits through Extrapolation Artifacts, AES Audio Forensics 2019, Porto, Portugal

• Zjalić, J. (2019) iPhone Video Metadata: What can it Teach us About a Recordings History?, AAFS Annual Conference 2019, Baltimore, ML, USA

• Zjalić, J. (2018) A Proposed Enhancement Framework for Forensic Audio, AAFS Conference 2018, Seattle, WA, USA

• Grigoras, C., D.S, Smith, Zjalić, J. (2017) A Low Cost, Cloud-Based, Portable ENF System, AES Audio Forensics 2017, Arlington, VA, USA

• Zjalić, J. (2017) Determining Dimension Specific Information for Monaural Sound Recordings, AES Audio Forensics 2017, Arlington, VA, USA

• Annual competency testing

• Participation in proficiency testing

• Work conducted within ISO 17025 quality framework for selected activities

• Operates in accordance with FSR Codes of Practice for selected activities

Casework experience spans a wide range of matters, from the most serious criminal cases to civil and family proceedings.

• 10 years of expert witness experience

• Approximately 2000 forensic reports

• Approximately 20 courtroom expert witness appearances