Not a whole lot.
In cases involving DUI in Florida, standard procedure calls for law enforcement officers to request that the suspect provide a breath sample for analysis. The Florida Department of Law Enforcement approves certain devices designed to analyze a breath sample and determine the amount of alcohol contained in it for use by Florida law enforcement officers.
Often these machines might not be calibrated properly, or too much or too little breath might skew the results in either direction. But a correctly calibrated approved machine is usually a fairly good way to determine whether a person is under the influence of alcohol at any given time. As anyone who has ever had a beer or two (or three) can attest, alcohol is generally removed from your system within a few hours. Thus if a person takes a breath test twenty-four hours after being intoxicated from alcohol, unless they have had more alcohol they will genreally pass a breath test.
Not so with marijuana. Marijuana is fat-soluble and is stored in fatty tissues of the body long after its influence wears off. How long it remains in the system is related to several case-by-case factors, including but not limited to body mass index, body-fat percentage, metabolism, hydration level, and frequency and duration of use, but it can still remain in the body for thirty or even in some extreme cases up to forty-five days. Making matters more complicated is that urinalysis is the only scientifically reliable way to test for the presence of THC, one of the active components of marijuana, in the body. But urinalysis is completely useless for determining whether a person was actually under the influence of marijuana when the test was given because of how long it is stored in the body's fatty tissues.
Our firm possesses the very highest expertise in evaluating urinalysis for marijuana and also the newer (and extremely dangerous) synthetic marijuana (sometimes known as "K2") now available. There are countless defenses and techniques for challenging these types of tests. If you have any questions, please do not hesitate to contact our office.




