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Expert witness
Cryptocurrency Expert Witness US
Independent expert witness services - court-ready reports prepared for US legal proceedings.
We provide independent expert witness services for legal proceedings involving cryptocurrency - delivering clear, technically rigorous testimony and court-ready reports prepared to meet the evidentiary standards of US state and federal courts. Instructed by law firms, prosecutors, and government agencies.
Free 10 minutesFree initial consultation
$350 USDper hour
Ongoing consulting rateExpert witness
Meet the expert
Nic Turnbull
Lead Forensic Consultant & Expert Witness
Blockchain forensics, digital asset valuation & expert testimony
Nic Turnbull brings international courtroom experience (New Zealand and Australia), available for US matters. He delivers independent expert evidence with deep technical expertise, transparent methodology, and a clear understanding of his duties to the court as an independent expert.
Services
What we cover
From expert reports and oral testimony to foundational evidence and counsel briefings - independent expert witness services built for United States court proceedings.
Expert witness reports
Court-ready forensic reports meeting the evidentiary standards of the United States courts.
- Structured expert reports prepared to federal, state, and family court standards
- Plain English executive summaries alongside full technical appendices
- Transaction flow diagrams and visual evidence mapping for court presentation
- Transparent methodology with independently verifiable findings
- Prepared to withstand scrutiny under rigorous cross-examination
Oral testimony
Clear, independent testimony delivered in court - explaining complex blockchain evidence to judges, juries, and counsel.
- Oral evidence in state, federal, and family court proceedings
- Jury-accessible explanations of complex blockchain concepts and transaction evidence
- Available by audio-visual link for remote hearings
- Available for criminal, civil, and family law proceedings
- Available for urgent hearings and short notice engagements
Foundational evidence
Explaining the technical foundations of cryptocurrency for courts and juries with limited blockchain knowledge.
- Wallet attribution methodology and its evidentiary limitations explained clearly
- How blockchain transactions work - confirmed, unconfirmed, and irreversible
- Exchange mechanics and peer-to-peer trading conventions
- On-chain analysis methods and their forensic application
- The evidentiary limits of blockchain attribution and what can and cannot be proven
Transaction analysis & fund tracing
Forensic reconstruction of cryptocurrency transaction histories for legal proceedings.
- End-to-end transaction tracing across Bitcoin, Ethereum, and major EVM chains
- Wallet clustering and ownership indicator analysis
- Exchange identification and deposit address attribution
- Mixer and obfuscation layer analysis
- Movement of funds documentation for court presentation
Digital asset valuation
Retrospective valuations at legally significant dates for court proceedings and settlements.
- Point-in-time valuations at any date specified by the court or parties
- Portfolio valuation across multiple assets, wallets, and exchanges
- Market volatility and liquidity analysis for accurate fair value
- Methodology aligned with US legal standards for expert evidence
- Defensible valuations prepared for cross-examination
Pre-trial briefings for counsel
Technical briefings for attorneys and litigators preparing cryptocurrency cases.
- Plain English explanation of the technical evidence in your specific case
- Assistance preparing cross-examination questions on blockchain evidence
- Review of opposing expert reports and identification of weaknesses
- Ongoing availability throughout proceedings for technical questions
- Support preparing closing submissions on technical matters
Standards
What makes a good expert witness
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.
Independence
Our duty is to the court - not to the instructing party. We provide honest, objective analysis regardless of which side instructs us.
Technical rigour
Every finding is documented, every methodology is transparent, and every conclusion is independently verifiable. Nothing is asserted without evidence.
Clarity of expression
Complex blockchain evidence means nothing if the court cannot understand it. We explain technical concepts clearly - to judges, juries, and legal practitioners alike.
Court-ready documentation
Our reports are structured to meet US evidentiary standards - with plain English executive summaries alongside full technical appendices.
Defensibility under cross-examination
Every position we take is one we can defend under rigorous cross-examination. We do not overstate findings or go beyond the evidence.
Availability & responsiveness
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.
Process
How it works
Step 1
Initial instruction
Contact us or have your attorney 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
Scoping call
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
Engagement & terms
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
Analysis & reporting
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
Testimony
We deliver oral evidence in court or by audio-visual link - clearly, independently, and with our duty to the court front of mind.
Testimonials
What our clients say
Real client feedback from people we've helped with crypto consulting, wallets, and recovery.
★★★★★
Charlotte Martella
“For someone who didn't know how to withdraw ETH... these guys were fantastic. Very knowledgeable and fair price to pay for their service.”
Craig Whittaker
“Seen Nicolas yesterday to sort my Trezor hard wallet & get certain tokens off exchanges to my Trezor. He was super helpful & did everything I asked, would highly recommend.”
Contact
How can we help?
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@cryptocurrency-consulting.us
Enquiry type
FAQ