Digital Forensics Expert Witness Services
Law & Forensics delivers top-tier forensic expert witness services across litigation, arbitration, and regulatory matters, combining deep technical expertise with extensive legal knowledge to produce clear, credible, and persuasive testimony.
Digital Forensics Expert Witness Services, in plain terms
A digital forensics expert witness examines electronic evidence — computers, phones, servers, cloud accounts, application and access logs — and gives a court, arbitrator or regulator an independent opinion on what that evidence does and does not establish. Law & Forensics provides that expert: a named examiner from our bench who performs the work, writes the report and testifies to it. The deliverables are the ones litigation actually calls for — an expert report under Rule 26(a)(2)(B), a declaration or affidavit in support of a motion, deposition testimony, testimony at hearing or trial, and rebuttal of an opposing expert's report where the other side has one.
The service is for litigators, in-house counsel and their clients in civil, criminal and regulatory matters where the facts live on a device or in a dataset: trade-secret and departing-employee disputes, data-breach and standard-of-care claims, employment matters that turn on messages and access logs, contract disputes over what was actually delivered, source-code and IP cases, and investigations in which the adequacy of a forensic response is questioned. We are retained as testifying experts and, where counsel prefers to test a theory before committing to it, as consulting experts whose work is generally protected under Rule 26(b)(4)(D).
Every opinion rests on evidence acquired and handled to a stated standard — write-blocked acquisition, hash verification, a documented chain of custody, and procedures that follow SWGDE best practices, NIST SP 800-86 and ISO/IEC 27037 — because the method is what a Daubert motion attacks, and the method is what we are prepared to defend.
Digital Forensics Expert Witness Services capabilities
Affidavits and Expert Reports
Detailed, accurate, and readable analysis of complex technical issues, structured to communicate critical findings clearly to judges, juries, and other stakeholders in legal proceedings.
Deposition and Trial Testimony
Clear, compelling presentation of complex technical matters. Our experts break down intricate concepts and deliver credible, persuasive testimony before judges, juries, and arbitrators.
Forensic Protocols
Development and implementation of sound methodologies for identifying, preserving, and analyzing electronic evidence, adhering to industry best practices and legal standards to maintain evidentiary integrity and admissibility.
eDiscovery Support
Customized protocols for collecting, processing, and analyzing electronic evidence in high-stakes litigation, streamlining the eDiscovery process while controlling costs and supporting the legal team's strategy.
Cybersecurity and Data Breach Testimony
Testimony explaining an organization's cybersecurity measures and how they compare to industry standards, addressing the technical merits of data breach allegations before judges, juries, and arbitrators.
Evidence Authentication and Chain of Custody
Digital evidence is only useful if it can be authenticated. We preserve with verified hashes, document custody end to end, and prepare the certifications contemplated by Federal Rules of Evidence 901(b)(9) and 902(14) so authentication does not become the fight.
Consulting and Testifying Engagements
We serve in both roles. A consulting expert's analysis is generally protected from discovery under Rule 26(b)(4)(D), which lets counsel test a theory before committing to it; if the matter proceeds, we can then be designated to testify.
Digital Forensics Expert Witness Services — what the engagement looks like
Conflicts check and scoping
We run conflicts first, then hold a scoping call with counsel to define the questions the expert is being asked to answer, the materials in scope, and whether the role is consulting or testifying. The engagement letter records all three, and we say candidly at this stage if an expert is not the right spend yet.
Preservation and acquisition
Where evidence has not yet been collected, we image it: write-blocked acquisition of physical media, supported export paths for cloud and SaaS data, hash values computed at acquisition and re-verified, and a chain of custody logged from first contact. Where a collection already exists, we assess whether it holds before building anything on it.
Examination and analysis
The examiner works the artifacts — file-system metadata, USB and cloud-sync history, message stores, logs, code repositories — with validated tools, recording tool versions, hash values and every analytical decision as the work proceeds, so the method can be reproduced by an opposing expert and defended by ours.
Report, declaration and authentication
Findings are written as a Rule 26(a)(2)(B) report or a declaration: each opinion traceable to the artifact it rests on, the basis and reasons stated, and the limits of what the evidence shows stated just as plainly. Where authentication would otherwise become the fight, we prepare the certifications contemplated by Federal Rules of Evidence 901(b)(9) and 902(14).
Deposition, hearing and trial
The examiner who did the work is the person who testifies to it. We prepare with counsel for deposition, Daubert or Frye hearings, preliminary-injunction hearings and trial, and where the other side has served an expert we examine that report for the places its conclusions outrun the underlying data.
Digital Forensics Expert Witness Services — matters we are engaged for
Trade secret theft and departing employees
The most common reason counsel calls us. We establish what data left, how it left, and who moved it — USB history, cloud sync, personal webmail, print logs, and mass-copy activity in the weeks before resignation — and present it on a record built to survive a preliminary-injunction hearing rather than merely to support one.
Employment disputes and workplace misconduct
Harassment, discrimination, and wrongful-termination matters increasingly turn on messages, timestamps, and access logs. We recover and authenticate communications across email, Slack, Teams, and mobile devices, and testify to what the artifacts do and do not establish about who saw what, and when.
Fraud, financial crime, and asset tracing
We reconstruct transaction trails across accounting systems, banking records, and blockchain, then explain the reconstruction to a finder of fact. Our panel includes former federal investigators, so the analysis is framed the way an investigator or regulator will read it.
Data breach and cybersecurity disputes
When the dispute is whether an organization's controls were reasonable, testimony has to address both the technical facts of the intrusion and the standard of care. We testify to intrusion scope, dwell time, exfiltration evidence, and how the program compared with recognized frameworks.
Commercial and contract disputes
Failed implementations, disputed deliverables, and service-level disagreements often hinge on system logs and version history rather than on correspondence. We analyze the technical record and give the court a defensible account of what was actually delivered and when.
Regulatory and government investigations
SEC, CFTC, DOJ, and state regulatory matters demand preservation and production that will withstand a second look. We support the forensic response and testify to methodology when the adequacy of that response is challenged.
Software, source code, and IP disputes
Copying allegations require comparison of code, build artifacts, and commit history — not impressions of similarity. We conduct the comparison, document the method so it can be reproduced by an opposing expert, and testify to the findings.
How our testimony holds up
Federal Rule of Evidence 702 requires that an expert's opinion rest on sufficient facts or data, be the product of reliable principles and methods, and reflect a reliable application of those methods to the facts of the case — and since the December 2023 amendment, that the proponent demonstrate each of those by a preponderance of the evidence. Daubert v. Merrell Dow made the trial judge the gatekeeper of that reliability, and Kumho Tire v. Carmichael extended the gate from scientific testimony to technical and other specialized knowledge, which is where digital forensics sits.
We build every engagement on the assumption that it will be challenged. Validated tools, documented procedures, known error rates where the method has them, contemporaneous notes of each analytical decision, and conclusions that stay inside what the artifacts show: these are the Daubert factors applied as working practice rather than reconstructed once a motion is filed. In state forums that still apply Frye, the same documentation answers the general-acceptance question. Where the other side's expert has already been served, our Daubert challenge defense work examines that report for unvalidated tools, unstated assumptions and inferential leaps, and supplies counsel with the technical basis for the motion or the cross-examination.
The record is public where the matters are. Our experts' appointments and testimony are listed by matter and citation, and the case studies show the pattern: a source-code expert whose testimony survived a Daubert challenge and carried a patent trial, and forensic examination of repositories and access logs that supported a nine-figure trade-secret arbitration award.
The bench behind the testimony
Law & Forensics is a bench of seven named experts, not a single practitioner, and the examiner assigned to a matter is chosen for it. Daniel B. Garrie, the firm's founder, holds computer-science degrees alongside his law degree and testifies as a digital forensics, cybersecurity and e-discovery expert in state and federal court. J-Michael Roberts, a Senior Director, is a forensic examiner who has testified in a federal criminal prosecution in the District of Massachusetts and in international arbitration, and who created the VirusShare malware repository. Roland Cloutier, formerly Global Chief Security Officer of ByteDance and TikTok, has served as an expert consultant in more than twenty disputes. David Cass brings the perspective of a former Federal Reserve Bank of New York supervisor and IBM chief information security officer to breach and controls testimony. Jeremy Desor, a Special Agent with the FBI for more than twenty-one years, testifies to financial-crime and asset-tracing analysis; George Pierce, a former chief legal officer, and Gary Corn, former General Counsel to U.S. Cyber Command, cover the corporate-governance and cyber-conflict questions that forensic matters increasingly raise. See the full expert panel.
Before litigation: the fixed-fee front door
Where a matter is anticipated but not filed — a departing employee, a suspected trade-secret loss, an ESI protocol about to be negotiated — the Evidence Readiness Assessment is the fixed-fee, fixed-scope engagement that maps what data exists, ranks what is at risk of loss, and states candidly whether it can be preserved and authenticated. It is prepared by the same examiners who testify, and it lands at the point where preservation decisions are still reversible.
Digital Forensics Expert Witness Services — frequently asked questions
What forensic expert witness services do you provide?
We prepare affidavits and expert reports, deliver deposition and trial testimony, and develop forensic protocols for identifying, preserving, and analyzing electronic evidence in litigation, arbitration, and regulatory matters.
How do you ensure that electronic evidence remains admissible?
Our forensic protocols apply sound methodologies for identifying, preserving, and analyzing electronic evidence, with every step adhering to industry best practices and legal standards to maintain the integrity and admissibility of the evidence.
Can your experts explain technical matters to a non-technical audience?
Yes. Our experts are skilled at breaking down intricate technical concepts and presenting them clearly and persuasively to judges, juries, and arbitrators in both written reports and live testimony.
What types of matters do you support?
We support a wide range of matters, including trade secret misappropriation, data breach and cybersecurity disputes, and complex eDiscovery in high-stakes litigation, tailoring our approach to the specific needs of each case.
How early should we engage a testifying expert?
Earlier than most teams do. Decisions made in the first days of a matter — what gets preserved, how devices are imaged, which custodians are in scope — determine what an expert can credibly say months later. Evidence that was never preserved cannot be recovered by expertise, and a collection performed without forensic method invites an attack on everything built from it. Engaging before collection is materially cheaper than remediating afterward.
What goes into a Rule 26(a)(2)(B) expert report?
For a retained expert, Federal Rule of Civil Procedure 26(a)(2)(B) requires a written report containing a complete statement of all opinions and the basis and reasons for them, the facts or data considered, any exhibits used to summarize or support the opinions, the expert's qualifications including publications from the previous ten years, a list of all other cases in which the expert testified at trial or by deposition in the previous four years, and a statement of compensation. We prepare reports to that standard as a matter of course, and maintain the underlying work so each opinion can be traced back to the artifact it rests on.
Do you also serve as a consulting expert?
Yes, and the distinction matters. A consulting expert who is not expected to testify is generally shielded from discovery under Rule 26(b)(4)(D) absent exceptional circumstances, which lets counsel understand what the evidence actually shows before deciding whether to build a case around it. Where a matter proceeds, the same team can be designated as testifying experts — though counsel should weigh that decision deliberately, because designation changes what is discoverable.
Do you testify in state court as well as federal court?
Yes. Our experts have testified in federal district court, state trial courts, and arbitral forums, and have been appointed as neutrals and special masters in several of them. Admissibility standards differ by jurisdiction — New York applies Frye rather than Daubert, for example — and the methodology we document is built to satisfy the stricter reading rather than the local minimum.
How is an expert witness engagement structured?
Engagements typically begin with a conflicts check and a scoping call, followed by a written engagement letter that defines the questions to be answered, the materials to be reviewed, and the role — consulting or testifying. Work is generally billed hourly against a retainer, with the rate depending on the expert assigned and the demands of the matter. We will tell you candidly during scoping if we do not think an expert is the right spend at that stage.
Digital Forensics Expert Witness Services — questions, terms and comparisons
Questions answered
Case law
Terms defined
Digital Forensics experts who testify to this work
Full expert panel →
J-Michael Roberts
Senior Director
Digital Forensics · Incident Response · Malware Reverse Engineering
Daniel B. Garrie
Founder
Digital Forensics · Expert Witness Testimony · Incident Response
Roland Cloutier
Expert Consultant
Incident Response · Expert Witness Testimony
Our experts serve as court-appointed special masters, forensic neutrals, and arbitrators — 40 appointments are listed by matter and citation.
Digital Forensics Expert Witness Services case results
Electric Utility / Power Generation
Forensic Attribution Halts a Departing Engineer's Theft of Grid Design Data at an Electric Utility
Logistics & Freight
Insider Theft of Proprietary Routing and Pricing Models Traced and Proven at a National Logistics Carrier
Public Research University
Forensic Attribution of Faculty Research-IP Theft at a Public Research University