If I use marijuana, can I still be busted for a DWI?

Yes, you can. But, drugs are normally measured in nanograms per milliliter of blood, which nobody really understands, especially jurors. But say they find 5 nanograms per milliliters of blood – prosecutors can’t argue that amount means. Specialists who analyze that data will say, “those numbers don’t really have meaning because the drugs affect everybody differently.”