The Reno Police Department also presented the findings of a recent study, regarding legalized marijuana. Deputy Chief Tom Robinson says since the first medical marijuana dispensary opened in Reno in 2015, RPD has seen a drop in the number of citations and arrests for marijuana possession and fewer investigations regarding marijuana. On the flip side, the number of DUI arrests is on the rise. In 2015, RPD made 648 arrests for DUI. In 2018, that number climbed to 1,033. 149 of those were marijuana DUIs. A recent study shows that 46 percent of the people arrested for DUI in Henderson had both alcohol and THC in their system but those numbers were not available in Reno. Robinson says legalized recreational marijuana use could be a factor in the rising numbers, but so could the addition of DUI officers in 2016 and 2019.