Prosecutors prosecuting the cannabis impaired driver, this is a MUST read.  NTLC's "Behind the Lines" article on how to educate your jury with your DRE or officer, trained to detect impairment caused by cannabis, is a MUST read.  You can find the article here.  If you are not yet a NDAA member, I highly encourage you to join and take full advantage of their expertise on traffic safety and impaired driving prosecution.