Even with half the nation having legalized medical marijuana, motorists from legalized states are still facing police scrutiny in states where the laws are otherwise.

Even with half the nation having legalized medical marijuana, motorists from legalized states are still facing police scrutiny in states where the laws are otherwise.

A Pew Research Center survey of nearly 8,000 police officers finds that more than two-thirds of them say that marijuana use should be legal for either personal or medical use.

A Pew Research Center survey of nearly 8,000 police officers finds that more than two-thirds of them say that marijuana use should be legal for either personal or medical use.

Do you get high? Do you drive? This is why you need to understand the laws behind DUI marijuana charges — and the particular science of THC, too.