Hate to burst anyone's bubble, but way back in the late '80s, the Feds were confiscating money in Dade County, FL if they found traces of cocaine on it, based on a theory that only money related to active drug dealing would be contaminated. For reasons I never understood, the task of calling them on this idiocy fell to the Coroner's office. They collected money of all denominations from cities around the US and a few foreign locations (I recall one was London). Their criterion for identifying cocaine was GC/MS analysis. Their summary result was that all US paper currency tested except "SOME" brand new bills fresh from banks were contaminated with identifiable cocaine. I read that as well over 90%. I was finally able to Google a legitimate reference to this information.
Please focus on the last two paragraphs.
From a Los Angeles Times article dated 1994 (http://articles.latimes.com/1994-11-13/local/me-62172_1_drug-money?pg=1):
"In its decision, the appeals court relied on uncontradicted evidence that more than three of every four bills circulating in Los Angeles were tainted with drug residue.
That evidence was provided by Ojai-based forensic toxicologist Jay B. Williams, who said he had done numerous studies since 1982 that turned up drugs on samples of $1, $2, $5, $10, $20, $50 and $100 bills taken from throughout the West--from banks, casinos, stores and restaurants.
Williams, who has specialized in drug and alcohol tests for 27 years, said last week that the percentage of contaminated bills ranged from 15% in Bozeman, Mont., to a little more than 75% in Los Angeles and Las Vegas.
The bills he tested contained quantities of cocaine as small as a nanogram, meaning one-billionth of a gram, to as much as a milligram, one-thousandth of a gram.
Williams' tests are consistent with other research nationwide. In one study, Florida researchers analyzed 135 bills gathered randomly from cities around the United States; all but four tested positive for cocaine.
One of those researchers, Lee Hearn, now the chief toxicologist for the medical examiner's office in Dade County, Fla., said: "The only bills that didn't have contamination were crisp new ones that had limited circulation, if any at all."
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