THC in Martin's system? How about the drugs Zimmerman was on prior to the shooting?

[NoGOPZone]

10. About that THC

Dr. Michael Policastro, a toxicologist, cautioned against reading too much into the blood THC levels, adding that one cannot make a direct correlation between those findings and a level of intoxication.

He also noted levels of THC, which can linger in a person's system for days, can spike after death in certain areas of the body because of redistribution.

And Dr. Drew Pinsky, an addiction specialist who hosts a show on CNN's sister network HLN, added that marijuana typically does not make users more aggressive.

Concentrations of THC routinely rise to 100 to 200 ng/ml after marijuana use, though it typically falls to below 5 ng/ml within three hours of it being smoked, according to information on the National Highway Traffic Safety Administration's website.

http://www.cnn.com/2012/05/17/justice/florida-teen-shooting/index.html