Despite the fact that recreational marijuana is legal for adults in ten states (plus Washington DC), I haven't seen many videos online showing motorists accused of impairment due to weed. In line with this channel's MO, let's change that. Related background information: In this video you will hear mention of the fact that Washington State established a blood level THC cutoff for per se impairment. Interestingly, as time has gone by law enforcement, law-makers and scientists have learned that the figure is not particularly reliable. Even Washington Traffic Safety Commission research director Staci Hoff has stated on the record that the number is completely arbitrary. “[The per se blood limit for THC of 5ng/ml wasn’t backed by scientific theories then, and it’s not backed by scientific theories now," said Hoff. Though the per se limit for alcohol is not perfect (as tolerance dramatically changes effects), .08% is a better predictor of intoxication than the limit for THC. That's because THC is a fat soluble drug. According to Hoff, chronic users of chronic [okay, she didn't say that] who haven't smoked recently could still exhibit a blood THC level of 10 - 20 ng per ml , but not be impaired. Conversely, someone who smokes for the first time might register no THC in their blood while still being too impaired to drive. ~~~ Real World Police is proud to be a Sunshine Supporter of the Washington Coalition for Open Government — working to educate, advocate, and litigate the public's right to know. Want to know more about access to public records in Washington? Visit www.washingtoncog.org. ~~~ Do you have independently verifiable inside information on a story we are or should be covering? Email tips@realworldpolice.com. Your identity will not be revealed without your consent. Because we receive dozens of tips daily we cannot respond individually to every submission. If we need more information from you someone will be in touch. Remember: we don't publish footage that has already been published. Please don’t send links to news articles. ~~~ Follow us on Twitter @realworldpolice ~~~ Want to help make Real World Police happen and get rewarded for it? Become a supporter on Patreon today! Supporters get access to: -Exclusive full-length Real World Police videos -The Roadcam series -Supporting documentation: police reports, court records, and other investigatory material -Material from cases not shown on the main channel, like the arrest of Chris Hansen and the detention of T-Pain that time he accidentally tried to bring a gun through airport security -Early access to some videos -And more! https://patreon.com/realworldpolice Rather not? That works too. There are more than 490 free videos to enjoy!