Impaired Driving—DUI, DWI, OWI & DUID
Independent toxicology review for alcohol- and drug-related driving cases
Dr. Ruby Javed provides independent forensic toxicology consultation for impaired-driving matters involving alcohol, prescription medications, over-the-counter medicines, and illicit substances.
Her review considers the available toxicology findings, laboratory documentation, case records, and relevant pharmacology. The purpose is to explain what the scientific evidence supports, identify its limitations, and communicate those conclusions clearly through consultation, expert reports, depositions, or trial testimony.
What do DUI, DWI, OWI, and DUID mean?
These abbreviations describe categories of impaired-driving offenses. DUI commonly means driving under the influence; DWI can mean driving while impaired or intoxicated; OWI commonly means operating while intoxicated; and DUID refers to driving under the influence of drugs.
The terminology and legal definitions vary by jurisdiction. A toxicology review addresses the scientific evidence, while legal counsel addresses the applicable law.
How can a forensic toxicologist help with an impaired-driving case?
A forensic toxicologist evaluates alcohol and drug findings in the context of the case. Relevant questions may include what substances were identified, how testing was performed, when specimens were collected, and whether the available findings support a particular interpretation.
The review may also identify missing information, alternative scientific explanations, and limitations that should be considered before drawing conclusions.
Does a positive drug test prove that someone was impaired?
No. Detecting a drug or its metabolites does not, by itself, establish impairment at the time of driving.
Interpretation depends on factors such as the substance involved, specimen type, timing of collection, and other available evidence. A scientifically sound review distinguishes evidence of exposure from evidence concerning impairment. NHTSA explains this distinction
Do blood and urine results provide the same information?
No. Different specimens answer different questions.
Blood findings may help evaluate substances present at the time of collection. Urine findings can reflect earlier exposure and do not, by themselves, establish impairment at the time of driving. Neither result should be interpreted without considering the specimen, testing method, collection timeline, and case circumstances. Scientific recommendations for impaired-driving toxicology
Why does the time between driving and specimen collection matter?
A specimen is collected at a particular time, often after the driving event. During that interval, substances may be absorbed, distributed, metabolized, or eliminated.
A later result therefore requires careful interpretation. It should not automatically be treated as a direct measurement of a person’s condition at an earlier time. NHTSA’s discussion of testing and interpretation limitations
Can prescription or over-the-counter medications be relevant?
Yes. Some medications can affect alertness, coordination, judgment, or reaction time. Effects depend on the medication and circumstances, and combining certain medications with alcohol or other drugs can increase impairment.
A prescription or medication history provides important context, but it does not independently establish whether someone was impaired during a particular event. NHTSA’s medication guidance
What records may be useful for a review?
Depending on the case, useful materials may include:
- Toxicology reports and available supporting laboratory data.
- Specimen collection times and chain-of-custody records.
- Relevant incident reports and documented observations.
- Medical records and medication information.
- Available timelines concerning driving, substance use, and specimen collection.
Dr. Javed can identify which materials are relevant after discussing the proposed scope of review.
Does Dr. Javed provide reports and testimony?
Dr. Javed’s services include written expert reports, consultation with counsel, depositions, and trial testimony. Her opinions are based on an independent evaluation of the available evidence, including any limitations or uncertainty.
The findings of a review cannot be predetermined, and retaining an expert does not guarantee a particular legal outcome.
How do I request a case review?
Use the existing Request a Consultation form to describe the matter and any relevant deadlines. The initial discussion helps establish whether the inquiry falls within Dr. Javed’s expertise and determine the proposed scope of work. Request a Consultation
Consult the Pricing & Engagement page for current fees, retainers, and engagement requirements. Pricing & Engagement