[nerrttrw]

This only shows that they used cannabis within the last 30-90 days of the crash. Basically it's a worthless statement.

sorry, but you're wrong about that. If they had cannibals in the their blood, they injested within the last 12 hours. See post #6.

A pee test will confirm use back 30 days, but the article said their blood was tested.

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How Long Does Marijuana Stay in the Body?

How Marijuana Is Metabolized
The active ingredient in marijuana -- Tetrahydrocannabinol or delta-9-THC or simply THC -- enters the body's bloodstream rapidly after smoking marijuana. If marijuana is ingested, rather than smoked, it takes longer to be absorbed into the blood, usually from 20 minutes to an hour and a half.

But THC is detectable in the blood for a short time, usually a few hours, because it is rapidly metabolized into molecules known as metabolites. At least 80 different metabolites are formed from THC. These metabolites are stored in body fat and are gradually eliminated from the body through feces and urine.

http://alcoholism.about.com/od/pot/a/marijuana_test.htm