Plain-language analysis of court decisions, statutes, constitutional issues, and current legal developments.

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Category: Law Updates

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.

In-Custody Deaths, Toxicology, and the End of Excited Delirium in California

California bars excited delirium as a diagnosis and civil evidence. Learn what AB 360 means for in-custody death toxicology and section 1983 causation.

Vehicle Code Section 21221: What Actually Applies to a Motorized Scooter Rider

California Vehicle Code section 21221 applies driver rules to scooter riders, while section 21221.5 creates a separate $250 under-the-influence offense.

An E-Bike Is Not a Motor Vehicle: Beale v. DMV Bars Refusal Suspensions

Beale v. DMV held that California cannot suspend a driver’s license for chemical-test refusal arising from an electric-bicycle ride. Analysis of the ruling, controlling statutes, limits, and defense strategy.

L.A. County District Attorney Ethics: Commentary and Sources

I have practiced in the Los Angeles County legal community for more than 23 years. During that time, I have appeared opposite hundreds of deputy district attorneys and, despite vigorous disagreements in court, I have never publicly criticized or complained about a prosecutor. That changed with this…

Federal Immigration Enforcement and the Supremacy Clause

The Ninth Circuit paused California’s “No Vigilantes Act,” ruling the state likely cannot force non-uniformed federal agents to display identification. Here is what the order does, and what it leaves undecided.

Research-Funding Litigation and the Trump Administration

In Thakur v. Trump , the Ninth Circuit split the difference for University of California researchers: viewpoint-based cancellations stay vulnerable, while routine terminations may sit beyond a federal court’s reach.

People v. Houston: When a Phone Call Is Not Enough

People v. Houston, the interrogation room, and the distance between a phone call and a car ride.

California Bail Conditions: What Courts Require

In re Kowalczyk and the end of wealth-based pretrial detention.

Stop-and-Identify Laws: When Must You Identify Yourself?

Your obligation — or lack thereof — to identify yourself to law enforcement depends heavily on where you are and why you were stopped.

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Recent Blog Articles

Breath-to-Blood Conversion: Scientific Limits and Records

A breath-alcohol instrument measures alcohol in a breath sample. It does not draw or analyze blood. When a breath result is discussed as though it were a blood-alcohol concentration, a conversion assumption connects two different biological measurements. That distinction is not merely semantic. It affects how a result should be…

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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.

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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.

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