Criminalist testimony in a California driving under the influence of marijuana trial

A driving under the influence of marijuana case presents many challenges to both the prosecutor and criminal defense lawyer that a driving under the influence of alcohol case doesn’t. One of the reasons is because there is no chemical test that gives a “number” as to the level of impairment in a marijuana-related case like in an alcohol-related case. Another reason is that the effects of marijuana on driving aren’t as recognizable or as distinguishable as an alcohol-related DUI. Simply having the drug in one’s system (if evidenced by a blood or urine test) may encourage conservative jurors to incorrectly conclude that the accused must have been under its influence. These are just a few of the reasons why it is imperative that an individual accused of this offense hires an experienced California criminal defense lawyer who specializes in driving under the influence of drugs (DUID) who will know the most effective ways to offer and rebut this type of challenging evidence.

Criminalist testimony regarding driving impairment is vital to the prosecution because there is no “per se” drug test that indicates when an individual is under the influence. As a result, officer observations and criminalist testimony provides the bulk of the state’s case. The criminalist is typically a member of the local police department and, as such, is a member of the “prosecution team”. A good defense attorney will generally address this issue, pointing out the inherent bias that the criminalist therefore has. The criminalist will typically testify that the driving pattern, physical signs and symptoms and behavioral observations reported by the officer are consistent with the known effects of marijuana and that, based on his or her review of the report (never having met or studied the accused), he or she believes that the driver was under the influence of marijuana.

Criminalist testimony, when presented on behalf of the defense, typically addresses the fact that correlating positive marijuana results with a degree of impairment is subjective and makes it difficult to predict with any amount of certainty whether someone was impaired based on a chemical test. The defense’s criminalist will further point out the fact that the effects of marijuana will vary between individuals, influenced by such factors as one’s history of drug use, tolerance, health, an individual’s sensitivity to the drug, metabolism and a variety of other conditions. He or she will explain to the jury that marijuana can be detected in one’s system via a blood or urine test for days and even weeks after use, long after the effects of impairment wear off. Depending on the circumstances, he or she may even call into question the experience, training or observations that the officer made as they relate to marijuana use.

Clearly, criminalist testimony is important to both sides. Even more important is having a criminal attorney who knows and understands the science behind how marijuana affects and remains in one’s body so that he or she can effectively convey the criminalist’s testimony to the judge and jury in an articulate and uncomplicated manner. The exceptional California DUI attorneys at The Kavinoky Law Firm specialize in driving under the influence of drug cases as well as non-driving cases that involve marijuana, which provides their clients accused of driving under the influence of marijuana with unparalleled legal representation. With law offices located throughout the state, including several in and around the Los Angeles area, they are easily accessible for anyone in need of an outstanding defense. They have a variety of criminalist expert witnesses that they rely on, depending on the facts of the case, which allows them to present the most effective defense for each individual client. To learn more, contact The Kavinoky Firm today for a free consultation.