Category: Forensic Toxicology

Drug Facilitated Crimes Series – Analytical Considerations Part 3.

This article explains Drug Facilitated Crimes Series – Analytical Considerations Part 3. and the scientific, legal or practical evidence readers should understand.

Blood Testing – Trial by Vial

This article explains Blood Testing – Trial by Vial and the scientific, legal or practical evidence readers should understand.

Understanding Forensic Toxicology: Key Concepts and Applications

This article explains Understanding Forensic Toxicology: Key Concepts and Applications and the scientific, legal or practical evidence readers should understand.

The Cost of a DUI

This article explains The Cost of a DUI and the scientific, legal or practical evidence readers should understand.

The Hair Print

This article explains The Hair Print and the scientific, legal or practical evidence readers should understand.

Drug Facilitated Crimes – Analytical Considerations Part 1

This article explains Drug Facilitated Crimes – Analytical Considerations Part 1 and the scientific, legal or practical evidence readers should understand.

The Controlled Substance Act

This article explains The Controlled Substance Act and the scientific, legal or practical evidence readers should understand.

Drug Facilitated Crimes – Evidence Collection

This article explains Drug Facilitated Crimes – Evidence Collection and the scientific, legal or practical evidence readers should understand.

Waiting to Exhale

Historical cannabis breath-testing article corrected for California law, chemical-testing distinctions, and unsupported device claims, with current source links.

Urine and Blood Drug Testing: Collection to Interpretation

How urine and blood drug tests move from collection and chain of custody through screening, confirmation, quality review, reporting, and bounded interpretation.

Medical Marijuana in the Workplace

This article explains Medical Marijuana in the Workplace and the scientific, legal or practical evidence readers should understand.

An Introduction to Drug Facilitated Crimes

This article explains An Introduction to Drug Facilitated Crimes and the scientific, legal or practical evidence readers should understand.

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Recent Blog Articles

Synthetic Sweat Recovery Does Not Prove Cannabis Collection Pads Are Interchangeable in People

Similar recovery of an added cannabis metabolite from collection materials does not establish that those materials perform interchangeably when sampling people. A 2023 study compared DrugWipe5A pads, cosmetic pads and cotton swabs using fortified synthetic sweat. Its results concern laboratory extraction and measurement, with an important gap before clinical or…

Read Article: Synthetic Sweat Recovery Does Not Prove Cannabis Collection Pads Are Interchangeable in People

A Cannabis Trial’s Smoking-Procedure Change Was Not a Randomized Safety Comparison

A cannabis driving trial reported fewer adverse events after switching from paced smoking to smoking to a desired effect. That observation does not establish the size of a causal safety benefit. The trial randomized cannabis-potency conditions; the smoking procedure changed during the study because the initial procedure was poorly tolerated….

Read Article: A Cannabis Trial’s Smoking-Procedure Change Was Not a Randomized Safety Comparison

THC Measured Per Forehead Sweat Pad Cannot Be Converted Into a Blood Concentration

A result expressed as nanograms of THC per sweat pad measures the amount recovered from that pad. It does not provide a blood concentration. A study involving drivers investigated in Italy illustrates why collection units, confirmation and participant selection must remain visible when interpreting forehead-sweat evidence. The collection sampled the…

Read Article: THC Measured Per Forehead Sweat Pad Cannot Be Converted Into a Blood Concentration