The Supreme Court has ruled that police may order blood drawn from an unconscious person suspected of driving under the influence without a warrant. While that sounds like a possible violation of the U.S. Constitution’s Fourth Amendment, which protects against unreasonable searches, justices in support of the practice claimed individuals consent to blood tests just by being on the road.

Their rationale? Wisconsin and a bunch of other U.S. states have laws that already make this legal and there’s a national precedent allowing for exigent circumstances. But let’s start with America’s Dairyland for some background.  (Read More…)

Impairment tests used by authorities in U.S. states where marijuana use is legal in some form have no basis in science, and their results essentially mean nothing, a recent study concludes.

Commissioned by the American Automobile Association’s safety foundation, the study found that no blood test for THC, the active ingredient in marijuana, can accurately determine a driver’s level of impairment, the Associated Press reports.

The finding blows law enforcement’s main method of convicting high drivers into the weeds. (Read More…)