A Guide to DUI Breath and Blood Tests San Francisco
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Understanding DUI Breath and Blood Tests San Francisco
Breath and blood tests play an important role in the post-arrest procedure and subsequent trial in a DUI case. Understanding how they work can make a significant difference in the outcome of your case. These tests aim to measure your blood alcohol content (BAC) to check if it is above the legal limit and determine if you’re driving under the influence.
Both types of tests have their own set of procedures and potential issues that could impact their accuracy. For example, the state has strict regulations under Title 17 that outline how these tests must be conducted, making it possible to challenge the results in court if any errors occur.
Having an experienced DUI defense attorney by your side is essential to navigate these complexities. We can help argue that the test results were inaccurate or unlawfully obtained, potentially reducing the charges against you. Continue reading for more information about DUI breath and blood tests in San Francisco.
Overview of DUI Laws
California’s DUI laws make it illegal to drive with a Blood Alcohol Concentration (BAC) of 0.08% or higher if you are 21 years old or older. For drivers under 21, the legal limit drops to 0.01%, and for commercial drivers, it’s 0.04%.
Furthermore, like all other US states, California has an implied consent law. The concept of “implied consent” means that by driving in the state, you automatically agree to submit to a chemical test (breath or blood) if suspected of DUI. Declining to take this test typically leads to an automatic administrative penalty – license suspension. You could face a one-year suspension of your driver’s license for the first offense and license revocation for 2 to 3 years for subsequent refusals.
DUIs are charged as misdemeanors in San Francisco, CA, until the fourth one in 10 years. The fourth DUI is a wobbler offense, meaning it can be prosecuted as a misdemeanor or a felony. Certain cases, like having a BAC of 0.15% or higher, causing an accident, or driving at excessive speeds, result in harsher penalties.
It is important to note that DUI laws also apply to driving under the influence of drugs. Whether it’s prescription medicine, over-the-counter drugs, or illegal substances, driving while impaired is against the law.
DUI Chemical Tests
To ascertain the blood alcohol levels of someone arrested on suspicion of DUI, there is a need to administer chemical tests. These tests provide results that help law enforcement determine whether the alleged offender is indeed above the legal alcohol limit. The most commonly administered types of chemical tests are breath and blood tests. However, one may be asked to take a urine test if the other two are unavailable.
Understanding Breath Tests
Breath tests are a key tool in DUI enforcement. They measure the amount of alcohol in a person’s breath sample to estimate their Blood Alcohol Concentration (BAC). These tests are commonly used by law enforcement during and after traffic stops.
There are two main types of breath testing devices: Preliminary Alcohol Screening (PAS) devices and Evidential Breath Testing (EBT) devices.
- PAS devices are portable and used during traffic stops to get an initial reading.
- EBT devices are more accurate and often used at police stations.
How Breath Tests Work
When you blow into the device, it measures the alcohol content in your breath. The device then converts this measurement to a BAC level.
PAS devices are used for field sobriety tests and can be administered without arrest. These are part of the Preliminary Breath Test concept. PAS devices tend to be more portable and used on the roadside to determine if there is probable cause for a DUI arrest. The results of a preliminary alcohol screening test cannot be used as evidence of intoxication in court, but that of an evidentiary test can.
EBT devices provide more precise readings and are often used as evidence in court. They tend to be bulkier and more stationary; hence, they are often used in the police station after a DUI arrest. However, in some California counties, police conduct tests using a Portable Evidential Breath-Alcohol Testing System (PEBT). This allows faster testing since they can be used at the point of arrest, leading to more accurate results.
Common Issues with Breath Tests
Breath tests can have inaccuracies. Improper calibration or administration can lead to false readings. Environmental factors like temperature and humidity also affect results. Diet and certain medical conditions, like acid reflux, can skew readings, too.
Legal Implications of Breath Tests
Evidentiary Breath Test results are critical in court cases. If they are not administered properly, it could ruin the whole case of the prosecution and lead to a case dismissal. Similarly, if the results indicate a BAC above the legal limit with no procedural errors, it could mean a sure conviction without the help of an experienced attorney who can raise other defenses. As such, hiring a skilled DUI attorney for legal representation is very important before your first DUI court appearance.
Understanding Blood Tests
DUI blood tests play a crucial role in determining blood alcohol concentration (BAC) and proving or disproving intoxication.
How Blood Tests Work
During a DUI blood test, a healthcare professional draws a sample of your blood, usually from a vein. This sample is then sent to a lab, where it is analyzed to measure the amount of alcohol present. Blood alcohol level tests are very precise and can accurately reflect BAC levels at the time the sample was taken.
Blood tests are often seen as more reliable than breath tests. They provide a direct measurement of alcohol in the bloodstream. In comparison, breath tests estimate BAC based on the amount of alcohol in your breath, which can sometimes lead to less accurate results.
Common Issues with Blood Tests
Despite their accuracy, several issues can affect blood test results. Contamination of the sample, improper storage, or mishandling can all compromise the integrity of the test. The sample needs to be collected and stored correctly to avoid these issues. Delays in testing can also cause the alcohol level in the blood to change, leading to inaccurate BAC readings.
Legal Implications of Blood Tests
Blood test results are frequently used as evidence in DUI cases. Since they are often seen as more reliable, challenging their results requires the help of a skilled attorney. We can argue that the sample was contaminated, mishandled, or otherwise compromised. If successful, this can cast doubt on the test’s accuracy.
Challenging Breath and Blood Test Results
There are several common legal approaches to challenge breath and blood test results.
- Improper administration: If the officer or medical professional did not follow the proper procedures in administering the breath or blood test, the test results can be challenged.
- Equipment malfunction: Breathalyzers and blood test equipment must be routinely maintained and calibrated. Any malfunction or improper maintenance can lead to inaccurate results.
- Violation of procedural rights: If your rights were violated during the testing process, this could invalidate the results.
- Expert testimony: Getting a medical expert to testify could be crucial in many cases. Experts can examine the methods and equipment used, potentially finding flaws that can cast doubt on the accuracy of the results.
How We Can Help You
At the Law Office of Rebecca Feigelson, our approach to challenging DUI test results is thorough and detailed. We conduct comprehensive investigations into the conditions under which DUI tests are administered. This investigation includes reviewing police records, equipment maintenance logs, and the qualifications of the personnel involved. We also review the legality of the DUI stop and the processes leading up to the administration of the tests.
Where necessary, our team also works closely with scientific experts who can analyze the data and provide testimony that may discredit the prosecution’s evidence. This can be particularly important in cases such as a third DUI, where penalties are more severe.
By combining these strategies, we aim to provide a strong defense for our clients facing DUI charges.
Furthermore, we don’t just deal with your DUI charge but also any other related charge that might be associated with your DUI. Our experience as criminal defense attorneys spans a wide range of areas, including but not limited to drug crimes, manslaughter or murder, assault and battery, petty theft, and grand theft.
Contact the Law Office of Rebecca Feigelson
If you are facing DUI charges, you need a skilled attorney on your side. If you need legal assistance in any Bay Area county, book a consultation with the Law Office of Rebecca Feigelson. Our team is available to address your needs.