A report from CNN says that an autopsy performed on Trayvon Martin’s body found elements of THC in his blood system. 1.5 nanograms per milliter of one type and 7.3 nanograms per millileter of another type (THC-COOH). THC levels increase after marijuana use.
The medical examiner stated that "there was also a presumed positive test of cannabinoids in Martin’s urine".
The THC levels in Martin’s blood system would be enough to have him be considered too impaired to drive in California which has their limit set at 5ng/ml of THC-COOH.
This is great news for Zimmerman. It does not necessarily clear himself of the charges. But it could be used to prove that he had reasonable suspicion about Trayvon Martin… not just because of someone of his race wearing a hoodie.
The autopsy also revealed Martin had injured knuckles which suggests Martin punched Zimmerman.