"We know from really good survey data that Americans use cannabis products billions of times a year, collectively. Not millions of times, but billions of times a year," Keith Humphreys, a former senior policy adviser at the White House Office of National Drug Control Policy, told The Advocate. "So, that means that if the risk of death was one in a million, we would have a couple thousand cannabis overdose deaths a year. Let's assume (that the woman died from THC) is a fact. What do you conclude from that? It doesn't justify really anything from a policy viewpoint. It's just so incredibly unlikely."