Hi, I’m Aaron Olson.

I started this blog to educate you about the science of alcohol testing.

I’m an expert in breath, blood, and urine alcohol testing.

I have 16+ years of experience working in public and private forensic toxicology labs.

I’m the editor-in-chief of the DWI Journal, which publishes research and commentary on all aspects of DWI law and science.

My work includes working for the Minnesota State Crime Lab—the Bureau of Criminal Apprehension (BCA). While at the BCA, I analyzed alcohol in blood, breath, and urine.

I’ve been trained to maintain, operate, and certify the DataMaster DMT breath alcohol analyzer.

I’ve testified in court more than 70 times, taught the DataMaster DMT Operator Training course to officers in MN, and calibrated, maintained, and certified the DMT in the lab.

I am available to testify in forensic toxicology cases. I’ll look at your case to ensure the proper standards were followed.

You can contact me at:


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Forensic toxicologist.