Lucina Mendez
December 07, 2009
Intoxilyze 5000 EN
The Intoxilyze 5000 EN- The breath test equipment used to establish blood alcohol content in Minnesota DWI cases- has been a sore spot for state prosecutors and defendants alike, as they argue about how the results for the test are reached, and who should be allowed to know how it works.
Criminal defense attorneys have been arguing for over three years, that without the source code (the computer programming that shows how the Intoxilyzer takes a breath sample and turns it into a blood alcohol concentration reading), there is no way to determine if the Intoxilyzer breath test results are accurate.
Defense attorneys argue that without access to the results, there is no way to discover whether the test is accurate or not, and therefore sued the state of Minnesota for access to the device's code as they felt without it results should be inadmissible. Throughout the state, many defense attorneys have asked judges to either grant their discovery requests and force the prosecution to hand over the source code so they could test the accuracy of the results, or suppress the results, with varying degrees of success.
The State argued that it didn’t have the source code, and therefore could not provide the source them. CMI refused the state’s request to view the source code, as it claimed it was a trade secret, and therefore protected under federal copyright laws.
Lucina Mendez
Intoxilyze 5000 EN
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In April 2009 the Minnesota Supreme Court ruled in State v. Brunner that the State had 30 days to produce the source code, or the breath test was going to be suppressed. However, in a similar case, State v. Underdahl, the same Supreme Court said the defense had failed to prove that the source code were relevant to the case and therefore that breath test would not be thrown out without the code.
Last March the State of Minnesota- who has about 260 Intoxilyzer machines, sued CMI, claiming that as part of its contract with the company, it owns part or all of the source code and should have access to it. Only the manufacturer knew how the testing of the Intoxilyzer results worked. Not even the Minnesota Bureau of Criminal Apprehension knew the source codes, nor were they informed when the source codes were changed. Minnesota has about 260 Intoxilyzer machines.
In an ensuing agreement the manufacturer agreed to allow access to the code, those who wanted it could travel to CMI’s main offices in Owensboro, Kentucky and review the software behind the testing process, however, there were restrictions on who could view the code and in what format. On July 16, U.S. District Court Judge Donovan Frank published his opinion approving a settlement between the State of Minnesota and CMI.
Federal judge Donovan Frank, ruled that the agreement would not make “the source code reasonably and readily available to Minnesota litigants,” and subsequently threw out the settlement.
Lucina Mendez
Intoxilyze 5000 EN
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The Intoxilyzer passes a beam of infrared light over a breath of air from your lungs - and then measuring how much light comes back compared to how much was sent out, the Intoxilyzer analyzes how much energy was absorbed at each wavelength, and therefore the concentration of alcohol in your body. This is because alcohols molecules absorb light consistently at the same rate. The other molecules found in our breath-like water and carbon dioxide-don't do this.
Even if the Intoxilyzer machine is working perfectly when you blow into it, your Intoxilyzer test results STILL might not be accurate! Characteristics like being female or diabetic can artificially raise Intoxilyzer results.
Lung capacity has a lot to do with the results reported by the Intoxilyzer; as it’s measuring how much light comes back through a sample of air from your lungs. However, alcohol enters the lungs through tiny sacs, which are located in the lower end of the lungs. So, the air that comes from the top of your lungs has a lower alcohol concentration than the air at the bottom of your lungs. The bigger your lungs are, the bigger portion of the 1.1 liters of air required to fill the Intoxilyzer is coming from the "top" of your lungs. The smaller your lungs are, the more you have to dip into the bottom of your lungs to give a breath sample of 1.1 liters. This means that women, whose lungs are typically smaller than men's, can end up with higher Intoxilyzer test results.
Lucina Mendez
Intoxilyze 5000 EN
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Also, body temperature can affect Intoxilyzer results. This means that women, whose body temperatures can fluctuate during menstruation as much as 7.2 degrees Fahrenheit, can raise their breath test results by up to 25 percent.
Diabetics can have a substance known as ketone bodies in their breath, which is known as the condition ketosis. Ketone bodies are naturally occurring molecules in human bodies, but sometimes diabetics have large quantities of these molecules in their bodies, as do individuals with high fat diets or eating disorders. Ketone bodies absorb light in a manner similar to that of alcohol; as a result diabetics can have Intoxilyzer test results that read higher than their breaths actual alcohol content.
“In any case involving a breath test, I will obtain the calibration records, maintenance history, and accuracy checks of the machine that was used to test my client. If there are problems in any of these areas, the results may be excluded. If it is a blood test, I insist upon obtaining a "split" of the blood sample for independent testing. There are certain requirements about how these blood samples are to be taken and preserved. If there is an inadequate level of preservative or anti-coagulant, the blood may actually ferment and produce its own alcohol, rendering the results completely meaningless,” explains Attorney Darren T. Kavinoky, a Criminal Defense Lawyer and legal expert on DUI based out of California.
Lucina Mendez
Intoxilyze 5000 EN
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In July 2009 Judge Frank approved the latest settlement between the state of Minnesota and the maker of a breathalyzer device, he claims that, "Minnesota litigants will have reasonable and, in fact, unprecedented access to the Source Code for the Intoxilyzer, while CMI's intellectual property rights will be protected."
CMI agreed to make the code available in Minnesota in a printed, hardbound version. The full electronic version of the code will be still be available at their headquarters .The agreement contains a provision requiring good-faith negotiations, and if Minnesota litigants believe they need more access to the code and cannot resolve the dispute, they can seek an order from the court.
The Minnesota Society of Criminal Justice, a group of about 50 defense attorneys, argued the settlement doesn't provide meaningful access to the code because CMI doesn't make the electronic version available in Minnesota, only a paper version. The group feels that the paper copy would be useless for analytical purposes.
The Bureau of Criminal Apprehension conducted extensive Intoxilyze instrument validation testing before the machine was approved for use in Minnesota, including tests using simulator solutions having a known alcohol concentration, as well as testing on live subjects. Based on the results of this validation testing, the BCA concluded that the instrument performed properly, yielding accurate and reliable breath-alcohol measurements, and the Commissioner approved it for use in the State of Minnesota.
Lucina Mendez
Intoxilyze 5000 EN
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On July 18th, the Minnesota Society for Criminal Justice-a group of defense attorneys-voted to hire experts to travel to CMI headquarters in Owensboro, Kentucky to analyze the Intoxilyzer 5000 Source Codes. In the meantime, Department of Public Safety is preparing to hire an expert to perform an independent analysis should any issue be identified by the defense experts.
Other issues that exist when using the Intoxilyze 5000, and CMI newest model, the Intoxilyze 8000- is the underlying physical principle of the Intoxilyzer known as "Henry's Law," that states that the concentration of a volatile chemical in vapor above a solution is proportional to the concentration of the chemical in the solution. This is true in the laboratory, but in humans, the proportions can vary by as much as 50 percent.
According to a study conducted by Dr. Stefan Rose and Dr. Kenneth Furton "Henry's Law does not apply in the lungs. In order for Henry's Law to apply, three conditions must be met. One, the solution must be in a closed system, like a sealed bottle. The lungs are open, not closed. Two, the solution must be kept at a known, constant temperature. The lung temperature is never known, and the temperature is always changing. And three, the pressure must be kept constant. The lungs are always changing pressure, decreasing pressure to inhale and increasing pressure to exhale. Without all three conditions present, it is not possible for equilibrium to occur, and Henry's Law does not apply."
Lucina Mendez
Intoxilyze 5000 EN
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If you hyperventilate three times before you blow into the machine, you will reduce your breath alcohol by as much as 55%, according to Furton and rose. This occurs for two reasons. First the breaths cool off your lungs. When the lung tissues are cooler, less alcohol goes from liquid form into vapor. The result is a lower breath alcohol. Second, the breaths clear out the alcohol from your lungs, filling them with fresh air. Also by holding your breath before taking the test your breath alcohol could be increased.
A DWI in Minnesota is defined as driving with a blood alcohol content- or BAC- of .10 or higher. The most common charge is a fourth degree DWI, meaning that you have no prior DWI license revocations, and you agreed to take the Intoxilyze 5000 tests, and your BAC was below .20. A fourth degree offense is considered a misdemeanor which is punishable by up to 90 days in jail and a $1,000 fine, as well as a license suspension of 90 days.
As of August 2005, all states have DUI laws that deem "per se intoxicated"- any driver with a BAC at or above .08 percent. This means that drivers with a BAC at or above .08 are intoxicated in the eyes of the law, and no additional proof of driving impairment is necessary. Implied consent laws require vehicle drivers to submit to some form of chemical test, such as breath, blood, or urine testing, if suspected of DUI. If a driver refuses to submit to such testing, implied consent laws carry penalties such as mandatory suspension of a driver's license, usually for six months to a year.
Lucina Mendez
Intoxilyze 5000 EN
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Kari Taylor, who received a DUI in Anoka County in 2007, recalls her experience getting a DUI, “They had me take one test in the squad, and one at the station. I was told to breathe out until I heard this sound. I had one beer on an empty stomach about a half an hour before I was pulled over. I felt fine, thought I was fine. At the end of the experience, after paying the fines and getting my license suspended, I figured it was my own fault. Afterwards though, I wish I had been told how the test worked. If I had an advice to give someone who had a DUI or a DWI, I would tell them, whatever you do, get an attorney.”
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