The toxicology screen, which was done on Aug. 10th, found “12 nanograms/ML of Delta-9-THC”, the primary psychoactive ingredient in pot, in Brown’s bloodstream at the time of his death.
This amount of Delta-9-THC in Brown's blood was more than twice the amount that in Washington State--where marijuana is legal--would allow someone to be arrested for driving under the influence.
“Delta-9-THC detection in the blood defines impairment,” according to the report.
THC (delta-9-tetrahydrocannabinol) “seriously impairs judgment and motor coordination,” according to the National Institutes of Health (NIH).
And because 5 nanograms of THC causes approximately the same level of impairment as an 0.08 percent blood alcohol level, drivers with THC levels above 5ng/ML in Washington State – where smoking marijuana will be legal on Dec. 6th – can be prosecuted under the state’s DUI laws.
The toxicology report was part of the evidence heard by Ferguson grand jurors, according to the St. Louis Post-Dispatch.
The grand jury heard more than 70 hours of testimony from dozens of witnesses, including toxicology experts, over the past three months before they decided not to indict Wilson.
The evidence also included a Crime Lab Report by the St. Louis County Police Department that noted that “one (1) knotted clear plastic bag containing green vegetation,” which a chemical and microscopic analysis determined to be 1.5 grams of marijuana, was found on Brown’s body at the time of his death.