One would think that a company that manufactures drug tests for law enforcement would put a warning label on their test that said something like "This test cannot tell the difference between heroin and cheese" or "This test doesn't work that well, might want to use something else- this is what you get for going with the lowest bidder"...
But no! That isn't what the test manufacturer did. And so a man had to spend 4 days in jail because apparently the enzymes in cheese set a field test off.
That sound you hear.... yeah, thats me banging my head against my desk.