well while we're on this topic

you know how they bring drug dogs to highschools. Well if you are walking around with the scent of cannabis in your backpack, can you get in trouble? like if you were just walking around, and say a week or two ago there was some weed in there and though you can't smell the scent anymore ( a dog can )... would you get in trouble if there was a cannabis scent, but no weed?

btw, never bring drugs to school.
bad choice