The devices being developed are designed to look for evidence of tetrahidrocannabinol (THC) in the body—the main psychoactive compound in cannabis.
or using cannabis products in the 30 days prior to the survey.
However, detecting the substance is far more difficult than identifying alcohol, with Lynn describing the science as"amazingly challenging." This is because the quantity of the psychoactive compound in the body is tiny—hundreds of millions of times lower than than the amount of alcohol flowing through the body of someone who is drunk.
Currently, police forces must go through a time-consuming and expensive process to determine whether a driver is under the influence of marijuana. Forces often rely on Drug Recognition Officers who are specially trained to spot the types of impairment caused by different drugs. The new devices have the potential to streamline this process, the companies say, cutting down on costs and police time. Furthermore, the field tests will make it easier to convict those who have driven under the influence of marijuana, while also helping defense attorneys prove that their clients were innocent in cases where the suspect hadn't used the drug before getting behind the wheel.
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