Posted by duijim in on September 7, 2026
Many Atlanta DUI charges involve an arrest where the driver’s breath test is given and the result is low.Many times after making an arrest for DUI in Atlanta, drivers expect that if their breath test comes back low, then the incident is over. You suck into the machine, it spits out a number above .08 and the case is in the prosecutor’s hands. However, it is a precarious notion. The state-administered breath test machine is the Intoxilyzer 9000, and it has its share of problems, especially in Georgia. It’s a complicated technology that’s dependent on software, firmware, calibration and data transfer. As with any modern technology, it can have server issues, software bugs, and data log failures.
The Intoxilyzer 9000 is a Networked Computer.
Most people imagine a breathalyzer to be a basic scientific instrument, like a thermometer. The Intoxilyzer 9000, however, is a very technical, networked computer. A machine doesn’t just measure breath alcohol when a police officer uses it at a Fulton County jail or at a precinct. It carries out a number of self-checking tests, tries to adjust itself to the known environmental standards and records tons of information on the testing conditions and the machine’s internal state.
They are vulnerable to the same problems that affect your home computer or smartphone. They’re connected to a network, and they log detailed digital footprints. They have problems with the firmwares. They have to deal with lost packets. They sometimes fail their own in-house self test but are still used to process subjects in the mayhem of a hectic Saturday night in Atlanta.
What is the Server-Error Defense?
The server-error defense is one that detracts from the driver’s health and places full emphasis on the reliability of the machine’s digital systems. The Intoxilyzer 9000 creates internal logs of data when processing a breath sample. The integrity of the final blood alcohol reading is highly suspect if a network glitch, missing diagnostic log or failed self-test occurs during the administrative procedure.
These machines are used to their max in high-volume courts, such as Fulton County State Court and Atlanta Municipal Court. They process thousands of individuals every year. A good DUI lawyer will not take a .08 or more at face value. Rather, they make specific motions to get into the machine’s data logs, maintenance records, and transmission protocols.
The search for Reasonable Doubt in the Data
What we’re seeking when we pull the data logs of a particular Intoxilyzer 9000 are discrepancies that either the arresting officer overlooked or did not comprehend. For instance, did the device read a blank or a radio frequency interference warning prior to your test? Was information from the 20 minute required observation period not being logged correctly by the software? Did there appear to be any disruptions with the data transmission for the firmware to pass the diagnostic results to the Georgia Bureau of Investigation central database?
When the machines internal computer records indicate a transmission error or diagnostic failure at the time of your test, the numerical result is not considered scientific. If the machine could not establish its own software was always working perfectly, a jury can’t be expected to accept the machine beyond a reasonable doubt.
The Big Picture of Metro Atlanta
In Metro Atlanta the truth about DUI is that there is a lot more volume than procedure. Officers are attempting to process suspects quickly in order to get them on the road. In this hurried world, a machine that’s showing minor error codes or might not be logging the correct diagnostic data may well be utilized to collect evidence.
The prosecutors will assert that it is a state-certified machine and that the final number reflects that. But attacking the digital infrastructure of the Intoxilyzer 9000 makes the state’s case that much harder to establish: that the software and data transmission protocols were functioning flawlessly. In most cases, they are not able to bear this burden.
The results of the breath test are not a certain conviction, but merely a piece of electronic data. Electronic data is also prone to error, corruption and can be successfully attacked in court. If you have been charged with DUI in Georgia because of the reading of the number on the stick, your defense needs to go beyond the number. It has to check the code, the calibration and the computer itself.