"A hair test goes back 6 months. If some one has a past conviction for possession on their record why isn't that probable cause for a dwi arrest/conviction? It's all evidence of past use. This law is simply ridiculous."
Well, I can see that hair test not working because you technically wouldn't have the illegal substance in your blood at the time you were driving. But the law isn't ridiculous, the law is the law. What's ridiculous is that the legislature passed it. The police SHOULD enforce the law as is--enforce ALL the ridiculous laws, as is--and make the legislature change it. If ever sworn in as a cop, I'd be arresting fornicators, sodomits, and adulterers like you would not BELIEVE, if only to get them to change the stupid law.