Expert witness
Expert witness services for New Zealand's District, High, and Family Courts.
We provide independent expert witness services for legal proceedings involving cryptocurrency - delivering clear, technically rigorous testimony and court-ready reports that meet the evidentiary standards of New Zealand courts. Instructed by law firms, the Crown, and the Ministry of Justice.
Expert witness
Lead Forensic Consultant & Expert Witness
Blockchain forensics, digital asset valuation & expert testimony
New Zealand
Nic Turnbull is New Zealand's most experienced cryptocurrency expert witness - having provided independent expert evidence in proceedings before the High Court, District Court, and Family Court of New Zealand. He brings deep technical expertise, transparent methodology, and a clear understanding of his duties to the court as an independent expert.
Services
From expert reports and oral testimony to foundational evidence and counsel briefings - independent expert witness services built for New Zealand court proceedings.
Court-ready forensic reports meeting the evidentiary standards of New Zealand courts.
Clear, independent testimony delivered in court - explaining complex blockchain evidence to judges, juries, and counsel.
Explaining the technical foundations of cryptocurrency for courts and juries with limited blockchain knowledge.
Forensic reconstruction of cryptocurrency transaction histories for legal proceedings.
Retrospective valuations at legally significant dates for court proceedings and settlements.
Technical briefings for solicitors and barristers preparing cryptocurrency cases.
Standards
An expert witness in cryptocurrency matters must do more than understand the technology. They must be able to explain complex on-chain concepts clearly to judges, juries, and legal practitioners - and do so as an independent expert whose primary duty is to the court, not to the instructing party.
These are the standards we hold ourselves to on every expert witness engagement.
Our duty is to the court - not to the instructing party. We provide honest, objective analysis regardless of which side instructs us.
Every finding is documented, every methodology is transparent, and every conclusion is independently verifiable. Nothing is asserted without evidence.
Complex blockchain evidence means nothing if the court cannot understand it. We explain technical concepts clearly - to judges, juries, and legal practitioners alike.
Our reports are structured to meet NZ evidentiary standards - with plain English executive summaries alongside full technical appendices.
Every position we take is one we can defend under rigorous cross-examination. We do not overstate findings or go beyond the evidence.
We understand the pressures of litigation timelines. We are available for urgent matters, short notice engagements, and ongoing availability throughout proceedings.
We also provide subject matter expert briefings for courts, counsel, and legal teams requiring foundational cryptocurrency education - explaining how blockchain technology works, how transactions are structured, and what on-chain evidence can and cannot prove. These briefings are available separately from formal expert witness engagements and can be tailored to judges, juries, or legal teams at any level of technical familiarity.
Partners
Trusted legal, accounting, and industry partners we work with across New Zealand.
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Track record
Independent expert testimony on New Zealand's most complex cryptocurrency matters.
Recent cases
High Court
Wellington • 2025
Provided technical analysis and court testimony on blockchain transactions in a major murder trial in Wellington. Delivered foundational blockchain explanations to the jury covering wallet attribution methodology, transaction tracing, laundering methodologies, and movement-of-funds patterns relevant to the Crown's case.
Family Court
Auckland • 2025
Successfully traced and valued concealed Bitcoin and Ethereum holdings across multiple wallets and DeFi protocols during complex relationship property proceedings. Expert testimony resulted in fair asset division and court-ordered disclosure.
District Court
Auckland • 2025
Provided forensic cryptocurrency analysis and expert testimony in a $500,000 Bitcoin and crypto fraud case. Our investigation traced the flow of misappropriated funds across multiple wallets and exchanges, helping the Crown and Ministry of Justice interpret complex blockchain data.
District Court
Auckland • 2025
Provided a comprehensive market analysis of the global cryptocurrency sector for a major fraud prosecution. Our report detailed prevailing market conditions, asset price movements, and trading trends relevant to the alleged offences, assisting the Crown and Ministry of Justice in contextualising blockchain evidence.
Additional case details available on request to instructing counsel. All engagements conducted under strict confidentiality protocols.
Process
Step 1
Contact us or have your solicitor get in touch with a brief outline of the matter - jurisdiction, court, and nature of the cryptocurrency evidence. We'll respond within 24 hours.
Step 2
We speak with instructing counsel to understand the matter, review available evidence, and confirm we can assist as an independent expert. Confidential and no obligation.
Step 3
We agree scope, timeline, and fee structure. All engagements are strictly confidential - a full NDA is signed before any work begins. Fees quoted on a matter-by-matter basis.
Step 4
We conduct the forensic analysis and produce an expert witness report - remaining available for questions from counsel and responding to any request to respond to opposing expert evidence.
Step 5
We deliver oral evidence in court or by audio-visual link - clearly, independently, and with our duty to the court front of mind.
Contact
Looking to instruct an expert witness or discuss a cryptocurrency matter before the courts? Send us a message and we'll respond within 24 hours. All enquiries are strictly confidential - a full NDA is signed before any work begins.
Prefer email? contact@cryptoconsulting.nz
Enquiry type
FAQ
