DUI Breath Test

Never assume that a breath test reading over the legal limit means you will be convicted of driving under the influence of alcoholic beverages (DUI).

Even if your reading is well over the legal limit, important defenses exist that can lead to these types of charges being dismissed by the trial court or reduced by the prosecutor. In some cases, your attorney will fight to get the breath test results suppressed or excluded at trial.

The Intoxilyer 8000 machines are more than 18 years old. Many need repairs. Over time, law enforcement agencies have developed cost-cutting techniques that undermine the reliability of breath testing. Other problems involve human error or omission.

Click here to read more about our Recent Case Results in DUI Cases.

If you were arrested for a first DUI and your breath test reading was over .08 but at .20 or under, you might be eligible to enter a new DUI diversion program in Hillsborough County, known as RIDR.

Entering diversion like RIDR means that your DUI is reduced to reckless driving and that the court withholds adjudication so that you might be eligible to seal the criminal record.

Keep in mind that even for a first DUI, you still need an attorney to demand a formal review hearing within ten (10) days of the arrest, or the DUI notation will remain on your driving record for the next 75 years (even if your record is sealed after you complete the diversion program).

Attorneys for the DUI Breath Test in Tampa, FL

The goal in many cases is getting the DUI reduced to a less serious charge such as “reckless driving.”

If you were arrested for DUI and blew over the legal limit of .08, contact an experienced criminal defense attorney at the Sammis Law Firm.

The attorneys at the Sammis Law Firm focus on DUI defense and breath test DUI cases in Tampa and Hillsborough County, FL. We have offices in New Port Richey across from the West Pasco Judicial Center and in Clearwater near the Criminal Justice Center (CJC) courthouse.

Contact us to discuss your case today.

Call 813-250-0500.

Pre-trial Motions to Exclude the Intoxilyzer BAC Reading

In many of these cases, our goal is to have the breath test reading completely excluded so that if the case goes to trial, the prosecutor is not able to tell the jury that the client took the breath test or blew over the legal limit.

Issues regarding the breath test instrument can include:

  • The individual submits to the breath test before an arrest which is not allowed under Florida law;
  • The right to obtain an independent blood, breath, or urine test was violated;
  • The breath test operator failed to comply with rules regarding the Intoxilyzer, including:
    • the breath test operator was not properly permitted to administer the test;
    • the agency inspector was not properly permitted to maintain the breath test machine;
    • some unauthorized persons had access to the breath test instrument;
    • the officer failed to comply with the 20-minute observation period before breath testing;
    • the driver’s medical condition, such as Gerd, acid reflux, or dentures, lead to an inaccurately high reading because of irregularities in the way the breath test operator administered the test;
  • Filing a motion to obtain the source code or other information about flaws in the instrument that impact the accuracy or reliability of the breath testing;
  • Showing the agency inspector’s failure to follow certain procedures related to the menu options, calibration procedures, or set-up procedures; or
  • Filing motions to inspect the breath test instrument and testing environment.

Problems with DUI Breath Testing in Florida

The following problems can potentially affect a subject’s breath test on Florida’s Intoxilyzer 8000:

  • partition ratios;
  • body temperature;
  • alcohol pharmacokinetics and pharmacodynamics;
  • error ratios;
  • mouth alcohol detection;
  • breath volume issues;
  • out-of-tolerance results;
  • gastrointestinal reflux disorder;
  • radio frequency interference (RFI);
  • the absorption and elimination of alcohol from the body, and
  • potential maintenance tests that could have been performed or the regularity of performance of other possible maintenance tests,
  • Widmark’s formula and calculation.

Problems with Florida’s Intoxilyzer 8000

Just because the driver blew over the legal limit does not mean you will be convicted of DUI. In Hillsborough County, DUI cases are often reduced to reckless driving, especially when any kind of mistake with the testing procedure can be shown.

Breath testing errors can include both machine and human factors. The errors in breath testing that can affect the results include operator error and operator malfeasance.

Additionally, the following individual factors affecting the driver can impact the reliability of the breath test:

  1. The driver’s age or other factors impacting normal lung function;
  2. Conditions that could cause “mouth alcohol” including dental work or dentures;
  3. Medical conditions such as:
    • acid reflux disease;
    • GERD;
    • LPRD;
    • COPD;
    • Stomach bypass;
    • Gastrointestinal issues;
    • Diabetes;
    • Ketoacidosis;
    • Low carb and other unusual diets;
  4. Failure to follow the 20-minute observation period before testing.

DUI with a Breath Test BAC Over .08

In many cases, attorneys can file viable motions to suppress or exclude the breath test from evidence at trial. Florida uses a breathalyzer called the “Intoxilyzer 8000.”

Unlike the blood or urine test, no sample is preserved for retesting by the defense. The breath test machines are the least reliable way of determining alcohol concentration in the body.

The breath test machines cost around $6,000 each. Most of them have been in service since 2007. The instruments in Hillsborough County perform a large number of tests each month. The instruments are frequently sent out for repairs.

The attorneys at the Sammis Law Firm are training on determining problems with the instruments. We perform a complete audit of the machine used in your case.

We look at all monthly inspections performed on the machine, the yearly department inspection, and any inspections after repairs.

We also look at your breath test and the people that blew before and after you.

Breath testing errors can include both machine and human factors. The errors in breath testing that can affect the results include both operator error and operator malfeasance.

Pre-existing medical issues can also affect the breath test, including stomach bypass and other Gastrointestinal issues, Diabetes, Ketoacidosis, low-carb diets, COPD, acid reflux disease, GERD, and LPRD.

Even a petite body type or decreased lung capacity can make the readings less accurate and reliable.

Definitions in DUI Breath Test Cases

Florida law defines the following terms in DUI breath test cases:

  • Breath Alcohol Level – the term “breath alcohol level” (BAL) or “breath alcohol concentration” (BAC) is defined as the ratio or alcohol by weight in a person’s breath based upon grams of alcohol per 201 liters of breath (g/201L).
  • Breath Test Operator – the term “breath test operator” is defined as a person who has been issued a Breath Test Operator permit by the Florida Department of Law Enforcement.
  • Evidentiary Breath Test Instrument – a breath test instrument approved by the Florida Department of Law Enforcement under Rule 11D-8.003 F.A.C. and used primarily to conduct alcohol breath tests.

The Florida Department of Law Enforcement has the authority to specify techniques and methods for breath alcohol testing and to promulgate rules for the administration, implementation, and definitions of terms of the Alcohol Testing Program. § 316.1932(1)(a)(2)(1), (o), Fla. Stat.

The Florida Department of Law Enforcement has promulgated the following definition:

Approved Breath Alcohol Test — a minimum of two samples of breath collected within fifteen minutes of each other, analyzed using an approved breath test instrument, producing two results within 0.020 g/210L, and reported as the breath alcohol level. If the results of the first and second samples are more than 0.020 g/210L apart, a third sample shall be analyzed. Refusal or failure to provide the required number of valid breath samples constitutes a refusal to submit to the breath test. Notwithstanding the foregoing sentence, the result(s) obtained, if proved to be reliable, shall be acceptable as a valid breath alcohol level.

Fla. Admin. Code R. 11D-8.002(12).

The Intoxilyzer 5000 versus the Intoxilyzer 8000

The Intoxilyzer 5000 (I-5000) and the Intoxilyzer 8000 (I-8000) are devices that determine the presence of alcohol through infrared light absorption testing.

The machines require that a breath sample is passed through the sample chamber. The machine then sends infrared light of several wavelengths through the chamber to determine how much light has been absorbed by the ethanol in the breath sample.

The theory behind the machine is that by knowing the beginning voltage of the signal and measuring the voltage of the signal after the light has passed through, the device converts the analog signal produced into a digital reading.

The Intoxilyzer requires a sufficient breath sample to obtain a proper sample for analysis. For the I5000, the adequacy of a sample was based on minimum pressure, time, and level slope. For the I8000, the adequacy of the sample is based upon minimum volume, time, and slope.

Pressure refers to the minimum amount of force necessary to trip the pressure switch. In the Intoxilyzer 8000, pressure refers to the minimum force required to trip the pressure transducer. Slope refers to the instrument measuring minor differences during the blow to help determine whether mouth alcohol is present in the sample.

Theoretically, the I8000 is supposed to distinguish between mouth alcohol and the deeper lung air that provides the ideal sample. The I8000 uses pressure (which is measured by the flow of breath) and time of blow to determine if a sufficient volume has been introduced into the device.

An important difference between the Intoxilyzer 5000 and the Intoxilyzer 80000 is the number of calculations done in the machine’s software as opposed to the machine’s hardware. For the I5000, the process of measuring breath alcohol was largely hardware-driven, The hardware used analog comparators, resisters, and other parts providing a current to the computer processor.

On the other hand, in the I8000, the vast majority of the calculations are assigned to computer components. For instance, in the I5000, the machine required a minimum of a 6 (six) second blow to ensure a sufficient volume allowed for the slope detector to work correctly.

The Intoxilyzer 8000 assigns this determination of determining a sufficient sample to a computer that makes a determination of time and flow. Then that determination is compared to other readings obtained throughout the blow.

The computer within the machine must also detect interferent substances. As you can see, the Intoxilyzer 8000 assigns a much larger number of functions to the computer embedded in the device.

Arguments that the Machine is Not “Approved” Under Florida Law

Previous challenges have been litigated because the Intoxilyzer 8000 is not an “approved” machine under Florida Law. Florida law requires that the alcohol testing program of the Florida Department of Law Enforcement (FDLE) must evaluate only those machines listed on the Conforming Products List (CPL) of the U.S. Department of Transportation.

The CPL specifically names the Intoxilyzer 8000 manufactured by CMI but further provides that the machine “…analyzes breath samples using the 3.4- and 9-micron bandwidth.”

The problem is that the Intoxilyzer 8000 used in Florida does not use the 9-micron or 3.4 micron bandwidth. Since the Intoxilyzer 8000 used in Florida is not the same machine as what is listed on the CPL then it should not be considered an “approved” machine under the Florida statutes.

The Intoxilyzer 8000 Only Uses Two Filters

Although CMI refused to disclose the specifications for years, in the summer of 2009, CMI disclosed that in the Infrared Filter specifications the center wavelength of the Infrared filters is determined to the three decimal place accuracy. The Intoxilyzer 8000 uses two narrowband Infrared filters with a center wavelengths at 3.476 microns and 9.376 microns.

One of the biggest programs with this machine is that it only uses two filters. The Intoxilyzer 5000 used 3 filters, the Intoxilyzer 5000 EN used 5 filters, and the Intoxilyzer 9000 has 4 filters.

By using only two filters the chances that the machine might interpret an interferent as alcohol is greatly increased.

The result is reported solely based on the 9.376 micron bandwidth, and the 3.467 bandwidth is used only to attempt to detect an interferent.

The software is allegedly programed to report the error – “interferent detected” – if the readings from each bandwidth have a 10% disparity.

“Pulling the Plug” on the Intoxilyzer 8000

New challenges have been brought not based on the bandwidth issue, but in order to show that a particular machine is not approved because of problems with the routine monthly and annual inspections.

Criminal defense attorneys have shown that these machines often fail the routine monthly inspections.

In many cases, the agency inspectors falsify the reason that the machine failed (for instance they claim that an “o-ring” failed). In some cases, the departmental inspectors are caught unplugging the instruments or otherwise causing a power outage.

The Florida software was configured so that the agency or departmental inspector can “dump” any record that the machine failed an inspection by unplugging the instrument or otherwise causing a power outage.

The only evidence left behind is the fact that a login occurred that cannot be explained.

The most recent occurrence of this type of questionable power outage occurred during a routine inspection on 80-001731 on 5/06/13 when Agency Inspector Roger Skipper reported that a surge protector fell out of the wall and turned the machine off during an inspection.

All data was lost and Roger Skipper did not fill out a Form 40 to properly document the non-compliance. Instead, the facts were hidden in an interoffice memo which we argued did not comply with 11D-8 rules.

Hiding the “Source Code” to this Mysterious Machine

The results of the breath test machine should not be admissible because the State of Florida and the manufacturers of the machine are hiding the “source code” of the machine, and without the “source code” there is no way to determine if the machine really works.

Previous rulings throughout the State have held that the DUI defense attorney is not entitled to see the source code of the breath machine or to have an expert witness look at the source code of the breath test machine.

Those cases, however, hinged on the fact that the DUI attorney did not make a specific showing at the hearing that the source code was relevant or that any flaw existed with the Intoxilyzer 8000 that would make examination of the source code necessary.

Problems with the Intoxilyzer 8000 When Used in a Mobile Unit

In many cases, the arresting officer will ask the person arrested for DUI to submit to a breath test on an Intoxilyzer 8000 that is located in a mobile unit which is often the officer’s vehicle or another officer’s vehicle. These roadside breath tests occur at the scene before the subject is transported to the jail.

Additional problems can occur when the breath test on the Intoxilyzer occurs at the roadside. It is well-documented that the subject tests on these machines have a higher number of Radio Frequency Interference (RFI) error / exception message.

The rules for breath testing require the breath test operator to clear the room when RFI is detected during the subject’s test by removing all electrical equipment nearby.

This is impossible at the roadside because the BTO has no idea what is causing the interference by radio frequence. The problem could be caused by a cell phone or other electrical equipment in a parked vehicle nearby, a cell phone tower, a WiFi router, or even nearby powerlines.

When RFI is detected but the source of the radio frequency is not correctly determined, the next reading is completely unreliable because radio frequency could be affecting the machine in ways that do not trigger the RFI error / exception message.

Another problem with the Intoxilyzer 8000 breath test machines in the back of police cars is that they are not always connected to a reliable power source. Any power surge can impact the accuracy and reliability of the reading.

Also, contaminates in the environment can cause problems for the Intoxilyzer 8000 which are more serious at the roadside when compared to a controlled environment in a testing facility located in a secure building.

For example, many DUI enforcement officers in Tampa and throughout Hillsborough County use a higher ethanol blend of fuel for the vehicle. In some cases, those chemicals can infer with the reading and cause much higher reading especially when the vehicle was running or the machine was located near the exhaust system.

Problems with the Qualifications for Breath Test Operators in Florida

What happens when the breath test inspector is not properly not qualified as a Breath Test Inspector?

In Florida, many of the breath test operators first obtained a permit as a breath test operator permit when the rules for breath test operators and inspectors were controlled by Health and Rehabilitative Services (HRS) under Ch. 10D-42.025, 10D-42.026, and 10D-42.027.

In 1993, the Florida legislature repealed the portion of the law that provided HRS with the power to promulgate rules when it amended Section 316.1932 and transferred the responsibility to the Department of Law Enforcement which first promulgated rules, including the first iteration of Rule 11D-8.008, F.A.C., regarding breath test technician permits.

Under the 1993 rules, the Department of Law Enforcement included a savings clause to allow breath test technicians, to continue to use their permits issued under the HRS rules.

In 1997, the Transition Clause was repealed and the rules were amended. In 1997, the Department of Law Enforcement eliminated “breath test technicians” and separated the breath test operator permit and agency inspector permit into two (2) distinct permits.

Section 316.1932, Fla. Stat., provides that The Alcohol Testing Program within the Department of Law Enforcement is responsible for the regulation of the operation, inspection, and registration of breath test instruments utilized under the driving and boating under the influence provisions and related provisions located in this chapter and chapters 322 and 327.

The FDLE also promulgated rules codified in Ch. 11-D of the F.A.C., including 11D-8.010 for the “Qualifications for Instructors” which provides:

(1) Persons who conduct breath test training courses must have a valid Breath Test Instructor certification issued by the Criminal Justice Standards and Training Commission, and such persons shall be deemed permitted by the Department to conduct breath test training courses.

(2) Unless exempted by the Commission, each breath test instructor must successfully complete the Commission-approved breath test instructor certification renewal course pursuant with Rule 11B-20.0017, F.A.C., to remain qualified for a breath test instructor certification.

Successful completion of the Commission-approved breath test instructor certification course or breath test instructor certification renewal course satisfies that person’s agency inspector and breath test operator continuing education requirements. Each breath test instructor must also successfully complete all Department breath test instructor update courses.

(3) Breath test instructors must adhere to and comply with the approved curricula and related forms when teaching Commission or Department approved courses and processing related documentation.

The Criminal Justice Standards and Training Commission is within the Department of Law Enforcement as mandated by the legislature. See Section 943.11(1)(a).

Read more about DUI cases in New Port Richey, FL.

Fighting to the DUI Breath Test Case in Tampa, Hillsborough County, FL

At the Sammis Law Firm, we have filed similar motions to contest these issues in Hillsborough County, FL.

As the judges become more familiar with the problems with Florida’s Intoxilyzer 8000, it becomes increasingly likely that the judges exclude the breath test results when a serious problem is found.

Contact us about the audits we perform on each of our client’s breath test results to determine whether a motion can be filed to exclude the breath test reading because the Intoxilyzer 8000 was not in substantial compliance with the administrative rules.

If you are accused of DUI in Tampa or Hillsborough County, FL, after submitting to a breath test and blowing over the legal limit then call us to discuss your case.

Call (813) 250-0500 today.

This article was last updated by Leslie M. Sammis on Tuesday, October 5, 2021.