Archive - The Science of Alcohol Testing

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The Misleading Presentation of DWI Test Results: A Call for Better Science

Minnesota defense attorney Charles Ramsay and I discuss the importance of open disclosure of DWI test results, measurement uncertainty, and how…

10 hrs ago •

and

28:52

A Win for the Observation Period in Breath Testing

Last week, a judge agreed with me that the pretest observation period in breath alcohol testing is necessary for a valid test.

Dec 4 •

November 2023

Uncovering the Flaws in Breath Alcohol Testing with Dr. Dennis Simpson

Dr. Simpson discusses the problems with mouth alcohol, and his research showing that breath tests are highly influenced by the duration of exhalation.

Nov 22 •

26:04

Mastering Data Point Analysis from the DataMaster DMT

Here's how you can analyze the data points from the DataMaster DMT.

Nov 17 •

Diving Into Forensic Metrology with Ted Vosk

Ted Vosk, an award-winning attorney and forensic consultant, discusses the importance of accurate measurements in forensic science and the challenges of…

Nov 15 •

,

, and

1:31:13

Another Win for Science

A jury came back with the verdict of Not Guilty after hearing me testify about the limitations of the DMT breath alcohol analyzer.

Nov 10 •

Are Standardized Field Sobriety Tests (SFSTs) Scientific?

I talk with Josh Ott, a Drug Recognition Evaluator (DRE), SFST expert, and former police officer about tests used during DUI investigations.

Nov 7 •

15:50

October 2023

Two Victories for Science

The results of two recent DMT breath alcohol tests were thrown out due to mouth alcohol. Here's how the cases were won.

Oct 31 •

Captivity in Forensic Science: Breaking Free from Law Enforcement with Max Houck

Listen now (26 mins) | Max Houck joins me to discuss the challenges in forensic science, including the captivity within law enforcement.

Oct 25 •

and

25:36

Can All Healthy Adults Use a Breath Alcohol Analyzer?

I talk with Galen Ives, about his latest paper showing that not all healthy people can provide a valid breath sample into breath alcohol analyzers.

Oct 6 •

and

13:15

September 2023

Finding Flaws in the Intoxilyzer Source Code with Charles Ramsay

Listen now | Chuck Ramsay joins me to talk about DWI science and law. Chuck tells me about the how the state tried to hide flaws in the source code of…

Sep 26 •

and

31:05

Adjusting for Bias in Alcohol Measurements

The results of a breath, blood, or urine alcohol test should be adjusted downward when an instrument is reading high.

Sep 20 •

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