Led by Daniel B. Garrie — JAMS Neutral · Faculty, Harvard · 100+ Expert Engagements
Mobile Forensic Expert Witness
Mobile-device forensics led by Daniel B. Garrie, Esq. — Founder of Law & Forensics, JAMS neutral, Harvard faculty, retained or court-appointed in 100+ disputes involving digital evidence.
Law & Forensics assists counsel and legal teams with disputes involving iPhones, Android devices, deleted messages, app artifacts, location data, mobile extractions, Cellebrite reports, GrayKey extractions, chain of custody, preservation failures, and the interpretation of complex mobile forensic evidence — from forensic analysis and report review to declarations, deposition, and trial testimony.
⚖︎Same-day conflict checks on most new matters, capacity permitting — expedited engagements accepted for near-term disclosure and hearing deadlines. Please hold privileged materials until the conflict check clears.
Your Expert
Daniel B. Garrie, Esq.
Founder, Law & Forensics · Neutral, JAMS · Faculty, Harvard
Recognized by the American Bar Association and the Federal Judiciary as a subject-matter expert on digital evidence; retained or court-appointed in 100+ disputes; author of 300+ widely cited articles. A JAMS neutral and Harvard adjunct teaching computer forensics — engaged as a consulting, testifying, or neutral expert.
Full bio & recognition →Start Here
What mobile evidence issue are you facing?
Select the situation closest to your matter. Each path routes to the relevant analysis and an intake tailored to that issue.
I need an expert witness
Testifying or consulting support to analyze, explain, and defend mobile-device evidence.
Expert witness services →I need to review an opposing expert report
Independent evaluation of acquisition, interpretation, assumptions, limitations, and conclusions.
Opposing report review →I need help with deleted messages
SMS, iMessage, WhatsApp, Signal — what was recovered, and what it can and cannot prove.
Deleted message analysis →I need help with phone location data
GPS, Wi-Fi, cell-site, Significant Locations, and app logs — precision versus accuracy.
Location evidence review →I need to evaluate a Cellebrite or GrayKey report
Extraction type, tool version, parsed versus unparsed data, validation, and reproducibility.
Extraction & report review →I need to preserve or collect a mobile device
Defensible preservation, collection, and documentation — before evidence is altered or lost.
Chain of custody & preservation →Why Expert Analysis Matters
Mobile evidence is rarely self-explanatory.
Forensic tools generate reports and artifacts. They do not, by themselves, establish what the data means or what it can prove.
Expert analysis is needed to evaluate the acquisition method, the interpretation of artifacts, timestamp handling, the true data source, sync behavior, deleted artifacts, application databases, chain of custody, and — critically — the limits of what the data can establish.
The same extraction can support very different conclusions depending on whether an artifact reflects user action, system action, synchronization activity, or application behavior. Distinguishing among them is where opinions are won or lost.
How we evaluate a report →Capabilities
Mobile forensic services for litigation
End-to-end support — from first review of an extraction through written findings, rebuttal strategy, and testimony.
Mobile forensic expert witness testimony
Testifying support that explains complex mobile evidence clearly and defensibly to courts and triers of fact.
Mobile forensic report review
Methodical evaluation of an existing extraction and report for reliability, completeness, and overstatement.
Rebuttal & opposing expert analysis
Identifying flawed assumptions, interpretation errors, and conclusions the data does not support.
Deleted message analysis
What was recovered, reconstructed, cached, synced, or merely inferred — and the limits of each.
iPhone & Android forensic analysis
iOS and Android artifacts, databases, and acquisition methods interpreted in legal context.
Location data analysis
GPS, Wi-Fi, cell-site, and app location evidence — precision, accuracy, and what it actually proves.
Cellebrite & GrayKey extraction review
Extraction type, tool version, device state, and parsed-versus-unparsed data validated against the record.
Chain of custody & preservation analysis
Whether the device was preserved, collected, and documented in a defensible manner.
Expert declarations & affidavits
Clear, properly bounded written opinions for motions, discovery disputes, and evidentiary hearings.
Practice Contexts
Matters We Support
Mobile-device evidence appears across the full range of disputes. Law & Forensics supports counsel and parties wherever phone evidence is contested or decisive.
Engagements may be consulting, testifying, or neutral, depending on the matter and the applicable standards.
- Civil litigation
- Criminal matters
- Family law & custody
- Employment disputes
- Trade secret & corporate investigations
- Internal investigations
- Regulatory matters
- Arbitration
- Discovery disputes
- Evidentiary hearings
Engagement Process
A measured path from intake to testimony
- STEP 01
Conflict check & intake
We confirm there is no conflict and scope the matter before any privileged or confidential material changes hands.
- STEP 02
Initial forensic evidence review
We examine the extraction, report, or device materials to assess reliability, gaps, and the questions the evidence can actually answer.
- STEP 03
Written findings, consulting, or rebuttal strategy
Findings, a consulting memo, or a rebuttal strategy — properly bounded to what the data supports.
- STEP 04
Expert report, declaration, deposition, hearing, or trial testimony
If the matter requires it, formal opinions and testimony delivered with rigor and clarity.
Trusted by Counsel
In their words
Anonymized perspectives from counsel, executives, and boards we have supported on mobile and digital evidence. Names are withheld to protect client confidentiality.
Law & Forensics helped us understand what the mobile evidence actually proved — and just as importantly, what it did not prove. Their ability to translate complex phone artifacts into clear litigation strategy was invaluable.
We came in with a mobile forensic report that looked conclusive on its face. Law & Forensics showed us the assumptions, gaps, timestamp issues, and interpretation risks that changed how we evaluated the case.
In a hospital environment, mobile evidence can involve employees, patients, privacy obligations, messaging platforms, and urgent operational realities. Law & Forensics understood both the technical evidence and the sensitivity of the setting.
Our agency needed an expert who could evaluate mobile-device evidence rigorously and explain it clearly. Law & Forensics brought the discipline, methodology, and testimony experience required for a high-stakes matter.
Mobile forensic evidence can look like a simple report until you have to defend it in deposition or court. Law & Forensics helped us prepare for the questions that mattered: chain of custody, tool limitations, deleted data, app artifacts, and what the evidence could actually support.
What impressed us was their restraint. They did not force conclusions the evidence could not support. That made the opinions stronger, more credible, and more useful in resolving the dispute.
Behind these perspectives: an expert recognized by the American Bar Association and the Federal Judiciary, a JAMS neutral, and a Harvard adjunct. See the full recognition →
Speak With a Mobile Forensics Expert
Have a mobile forensic report, extraction, or phone-evidence dispute?
Request a confidential, conflict-checked case review. Tell us what you're facing — we'll tell you what the evidence can and cannot support.
Facing a hearing or discovery deadline? We run same-day conflict checks on most new matters — call (855) 529-2466.
Submitting this request does not create an attorney-client, expert, or consulting relationship. Please do not send privileged or confidential materials until a conflict check is complete and an engagement agreement is in place.