Everyone knows that .08 is the blood-alcoholo level where you’re considered to be legally intoxicated, but what is the level with marijuana where you’re considered to be impaired? And who should determine that? A jury? Apparently there isn’t a set level that indicates impairment when using marijuana, which has led to a hung trial twice now in a case where a Deer Park man hit and killed a woman riding a scooter. Prosecutors say the defendant was driving under the influence, but his defense attorney says sheriff’s deputies at the scene didn’t notice any signs of impairment. So the question stands, when are you too stoned to drive? The Spokesman-Review has the story.