Los Angeles Forensic Toxicology Expert Witness

Okorie Okorocha, JD, MS, MS provides forensic toxicology expert-witness consultation for Los Angeles matters involving drugs, alcohol, medications, laboratory testing, impairment, pharmacology, poisoning, postmortem evidence, and complex scientific questions.

Expert review may include the complete laboratory packet, specimen and chain-of-custody records, screening and confirmation methods, calibration, quality controls, raw data, reported concentrations, pharmacology, case chronology, opposing opinions, and the scientific limits of the conclusion offered.

Forensic toxicology issues reviewed

• Blood, urine, oral fluid, hair, vitreous fluid, tissue, and other specimens
• Drug and alcohol identification and quantitation
• Detection compared with impairment, timing, dose, and causation
• Screening cross-reactivity and confirmatory testing
• Laboratory validation, calibration, controls, uncertainty, and corrective action
• Alcohol calculations, breath and blood testing, and interpretive assumptions
• Postmortem redistribution, decomposition, specimen source, and multiple substances
• Expert reports, deposition preparation, and testimony when appropriate

Request an expert-witness review

Prepare the scientific record

The Attorney Scientists research library provides question-led reading paths across the four connected websites, with a professional profile and literature-based research briefs. Use it to frame the scientific issue before assembling the case-specific record.

Before retention, identify the parties, jurisdiction, deadlines, specimen type, reported result, and the scientific issue in dispute. The Forensic Toxicology Case Review Checklist and Laboratory Packet Review Guide explain the records commonly needed for a meaningful review.

For independent scientific education, use ForensicToxicology.com. For litigation-oriented technical topics, use the ForensicToxicology.net Evidence Library.

Where Science Meets the Courtroom.

This page provides general information. A conflict check and written agreement are required before any legal or expert engagement.