The DUI Urine Test

Urine testing is seldom used in alcohol related DUI cases.  However, when a DUI arrest has
been made and cannabis or drug paraphernalia is found on the driver or in the vehicle, the police
will often request both a breath test and a urine test.

Even when breath testing indicates zero or minimal alcohol consumption, if the urine test
reveals metabolites consistent with cannabis use, the urine test can be used to substantiate a DUI
based on drugs.  It is an idiosyncracy of Illinois law that even if the last consumption of marijuana
was as much as 30 days prior to the urine test - well after the effects could possibly have an
impact on driving-if the urine test comes up positive the Defendant could well be found guilty of
DUI!


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