Police One: What cops need to know about blood alcohol testing and the Fourth Amendment

Police One: What cops need to know about blood alcohol testing and the Fourth Amendment by Terrence P. Dwyer:

Make sure you’re current on your state’s driving while intoxicated and implied consent laws

Driving while intoxicated is a serious offense that annually claims numerous victims and causes extensive property damage. States have a vested interest in protecting against the scourge of intoxicated motorists and exercising their enforcement powers in the form of criminalizing motor vehicle operation over a certain blood alcohol concentration. In order to determine BAC, a test must be performed. In order to ensure testing, states have passed implied consent laws that impose a penalty on a motorist who refuses to undergo testing. The preceding sentences paraphrase the opening of Justice Alito’s majority opinion in Birchfield v. North Dakota and set the tone for the remainder of the 38-page decision which determined the constitutionality of implied consent laws. Prior to discussing Birchfield a quick review of earlier case law is necessary.

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