Category: Expert Witness
Postmortem Methamphetamine Evidence: A Litigation Checklist
A litigation-focused checklist for evaluating postmortem methamphetamine evidence, including sampling site, redistribution, tolerance, overlapping concentrations, and laboratory records.
Edible vs. Vaporized Cannabis: Why Timing Changes the Evidence
The route of cannabis use changes the timing of both blood THC and observed effects. Controlled research shows delayed effects after edibles and rapidly falling blood THC after vaporization, even while performance effects continue.
Does THC Dilate Pupils? What Controlled Pupillography Found
The common claim that cannabis necessarily causes dilated pupils is too simple. A controlled pupillography study found reduced pupil size and a slower, less pronounced response to light after intravenous THC.
Postmortem Blood Alcohol: The Preanalytical Evidence That Can Change the Result
A postmortem ethanol number does not explain where the specimen came from, what happened before analysis, or whether some ethanol formed after death. A 2024 scientific review identifies the evidence needed to evaluate those questions.
How Accurate Are SCRAM and Other Transdermal Alcohol Monitors?
Wearable alcohol monitors measure alcohol vapor leaving the skin. They can provide a continuous record, but a transdermal alcohol curve is not the same measurement as breath or blood alcohol.
Breath-Test Records Needed for Scientific Review
A breath-test ticket is only the summary. Learn which instrument, calibration, reference-material, operator, sequence, and audit records support scientific review.
Presumptive Amphetamine Urine Screens: What a Positive Immunoassay Does and Does Not Prove
A forensic review of presumptive amphetamine urine screens, cross-reactivity, confirmation, methamphetamine enantiomers, and limits on impairment claims.
Rapid Urine Drug Tests in Court: 12 Records That Matter
A litigation-focused checklist for evaluating presumptive urine drug screens, device cutoffs, quality controls, confirmation data, chain of custody, and impairment claims.
Methamphetamine Toxicology Lawyer and Expert Case Review
Legal and scientific review of methamphetamine evidence involving driving, postmortem redistribution, laboratory methods, and expert testimony.
Rule 702 and Forensic Toxicology Expert Testimony
A scientific issue-spotting framework for qualifications, sufficient facts, reliable methods, reliable application, and helpful forensic toxicology testimony.
How to Review a Toxicology Laboratory Packet
A step-by-step guide to reviewing specimen records, analytical methods, calibration, controls, raw data, calculations, corrective actions, and interpretation.
Positive Drug Test vs. Impairment: What It Proves
A positive toxicology result can establish detection or exposure, but impairment, timing, dose, and causation require additional scientific and case evidence.
