2015, 43% of drivers tested in fatal accidents had used drugs. that's compared to 37% of drivers who were above the legal limit for alcohol. it's first time ever that the drug driving figure tops the drunk driving tally and fatal accidents. what about this? >> this is something i've really been focused on as a prosecutor in san francisco and los angele los angeles. when you start out in the d.a. office, you start out and prosecute a lot of drunk driving cases. i saw an increase in people who were pulled over for being under the influence of narcotics. when you look at the shift in this country and the epidemic of people addicted to opioids and other drugs, prescription pain medicine, it's become so prevalent in terms of the abuse of it. wrecking families. this is so significant and