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Litigation Consulting · Expert Witness
Quiet expertise for the toughest cases on your docket.
An independent consultancy for attorneys handling DUI, DRE, and vehicular crime matters where the technical record decides the case. Retained nationwide.
Who We Help
A clear path into a complex matter.
A direct path for counsel, individuals, and families.
FOR INDIVIDUALS
Individuals & Families
A confidential starting point for understanding whether technical review may help and how that work can coordinate with your attorney when counsel is involved.
Start a private inquiry →Selected Outcomes
Verbatim · Counsel of Record
01 · Vehicular Homicide
10-year prison exposure
reduced to a 9-month jail sentence.
reduced to a 9-month jail sentence.
“Retained Legal Limit Consulting for a vehicular homicide case in which my client was in jail and facing a 10-year prison sentence if convicted. Legal Limit's work on the case contributed to a significant reduction in the charge which resulted in a 9-month jail sentence.”
02 · DUI · Idaho
DUI charge
fully dismissed.
fully dismissed.
“Legal Limit Consulting was able to provide DRE analysis in a DUI matter for which I was defense counsel. Their analysis was thorough … It is my opinion that it was their services that led to a full dismissal of the DUI charge.”
Outcomes vary by matter. Quotations published with counsel's permission.
Expertise
Rare operational and litigation experience, applied to one practice.
Certifications and operational experience applied to focused litigation work nationwide.
01
Certified Drug Recognition Expert
Full IACP / NHTSA twelve-step DRE protocol, administered, audited, and cross-examined.
02
Advanced Collision Investigator
IPTM At-Scene & Advanced Crash Investigation. Lead investigator on serious-injury and fatal collisions.
03
Former Law Enforcement Officer
Career inside the same DUI and vehicular investigations the State now relies on at trial.
04
Nationwide Litigation Consultant
Retained by attorneys across the country on DUI, DRE, vehicular assault, and vehicular homicide matters.
05
Expert Witness & Trial Support
Administrative, motion, and trial testimony. Cross-examination strategy tailored to the State's experts.
06
Technical Discovery & Causation Review
Integrated review of impairment evidence, video, toxicology, and collision causation as a single record.
Supporting background: FARO 3D scene documentation experience · FBI Hostage & Crisis Negotiation certification · law enforcement subject matter consulting for AI development.
The Practice
An independent consultancy for attorneys where the technical record decides the case.
Founded by a certified Drug Recognition Expert and advanced collision investigator. Engagements are limited, conflicts are screened, and analysis is delivered with discretion.
Services
Where we add leverage.
01
Case Evaluation & Litigation Analysis
Comprehensive discovery review across every stage of an impaired-driving investigation, from vehicle in motion through toxicology reconciliation, delivered as a written strategic report.
02
Hearing & Trial Support
Expert testimony at administrative, motion, and trial proceedings. Cross-examination strategy, exhibit preparation, and litigation support tailored to the State's anticipated experts.
03
Embedded Firm Consulting
Ongoing strategic review and issue-spotting for select firms with significant DUI caseloads.
04
Vehicular Assault & Homicide Analysis
Integrated impairment and collision causation review for serious-injury and fatal matters.
Counsel Speaks
DUI · Must-Hire on Every Case · Washington
After 23 years of DUI work, I am pretty well versed in what to look for in a report, but when I got his work up, I was blown away. He spotted issues I had missed and cited all of his work. He did an extensive and well-detailed analysis of the videos and report and wrote up his findings in such a way that made it easy to use in negotiations. I was so impressed that I immediately hired him on many more cases, and his work has continued to blow me away. I now consider Mr. Marshall a must-hire on any DUI case.
Engagements
When the technical record decides the case, retain accordingly.
Initial conversations are brief, confidential, and without obligation. Conflicts are screened before any case material is reviewed.
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