Minnesota DWI Attorneys Entitled to Intoxilyzer 5000 Source Code Says State Supreme Court

Last week the Minnesota Supreme Court, in State v. Underdahl and Brunner, opined that the State of Minnesota must produce the Intoxilyzer 5000 EN source code if an individual charged with a DWI can show that the code relates to their guilt or innocence. Justice Meyer wrote for the majority.

Defendants Underdahl and Brunner sought discovery of the source code for the the Intoxilyzer 5000EN following DWI charges. In both cases, the trial court ordered the State of Minnesota to produce the code within one month, or the court would find that the breath test results were not admissible and dismiss the complaint against Underdahl and Brunner. The State of Minnesota appealed and the Minnesota Court of Appeals reversed. The Minnesota Supreme Court elected to hear the consolidated cases of Underdahl and Brunner.

The Minnesota Supreme Court upheld the Minnesota Court of Appeals decision to reverse the production order in Underdahl’s case. However, with respect to Brunner, the Supreme Court reversed and reinstated the trial court's order for State of Minnesota to produce the complete computer source code for the Minnesota model of the Intoxilyzer 5000EN.

The Supreme Court examined whether the trial court abused its discretion in concluding that the computer source code was relevant and otherwise discoverable under the Minnesota Rules of Criminal Procedure. Rule 9 provides:

Upon motion of the defendant, the trial court at any time before trial may, in its discretion, require the prosecuting attorney to disclose to defense counsel and to permit the inspection, reproduction or testing of any relevant material and information not subject to disclosure without order of court under Rule 9.01, subd. 1, provided, however, a showing is made that the information may relate to the guilt or innocence of the defendant or negate guilt or reduce the culpability of the defendant as to the offense charged.

The Minnesota Supreme Court has not previously stated what showing is required to support a trial court’s conclusion that information may relate to a defendant’s guilt or innocence in a DWI case. But in other criminal cases the Court has required “some plausible showing that the information sought would be both material and favorable to his defense.”

According to Justice Meyer, although broad discretion is given to district courts in discovery matters, the district court in Underdahl’s case abused its discretion in finding the source code relevant and related to his guilt or innocence. This was because Underdahl made no threshold evidentiary showing whatsoever; while he argued that challenging the validity of the Intoxilyzer was the only way for him to dispute the charges against him, he failed to demonstrate how the source code would help him do so. Justice Page and Justice Anderson dissented on the conclusion of the majority relative to Underdahl.

However, Brunner submitted source code definitions, written testimony of a computer science professor that explained issues surrounding the source codes and their disclosure, and an example of a breath-test machine analysis and its potential defects. Brunner’s submissions  demonstrated that an analysis of the source code may reveal deficiencies that could challenge the reliability of the Intoxilyzer and, in turn, would relate to Brunner’s guilt or innocence. Therefore, Justice Meyer found that the district court in Brunner’s case did not abuse its discretion in concluding that the source code may relate to his guilt or innocence.

In an article authored in Minnesota Lawyer by associated editor Barbara Jones, she points out that this decision may mean that breath tests are a thing of the past. According to Dakota County Attorney Jim Backstrom. “I will be instructing officers to only administer blood or urine tests until we get further clarification."

Good news on some fronts. Urine tests are the least reliable of the three forms of testing. Most agencies opt for urine testing as opposed to blood tests.

Intoxilyzer Source Code Cases Continue: State Doesn't Have an Obligation to Disclose; Not in Possession

On March 17, 2009, Judge Minge issued an opinion, in Patterson v. Commissioner,  that denied an individual accused of drunk driving the ability to obtain the Intoxilyzer 5000 EN source code from the State of Minnesota. Why? Because the state says it doesn't have it.

Patterson was arrested for DWI, and his driver’s license was revoked pursuant to the implied-consent law. On review of the revocation, he argued that he was entitled to discover the Intoxilyzer source code because of its relevance to his challenge to the revocation. The State of Minnesota stated that it did not have possession, custody, or control of the source code and offered an affidavit in support of that fact. The district court denied Patterson's motion and sustained his license revocation on several bases, including that there was no evidentiary basis to believe the code was possessed by or available to the State. Patterson appealed.

The issue in this case is whether the district court abused its discretion in finding that Patterson failed to make a showing sufficient to compel discovery of the source code. Rulings related to discovery entail a considerable exercise of discretion by the district court. According to Judge Minge, "the most obvious basis for the district court’s denial of appellant’s motion was its finding that there was no basis to believe that the source code was in the possession of or available to [the State]."

Judge Minge found that the finding of the district court in this case was grounded on the rule 34 requirement that, to be discoverable, an item must be in the “possession, custody or control” of the party from whom it is sought. The State presented an unchallenged affidavit from a toxicology supervisor for the BCA, who attested that “the only individual or entity in actual possession of the source code . . . is its manufacturer, CMI, Inc." On that basis, the Court of Appeals affirmed.

Minnesota Court of Appeals Denies Drunk Driver's Request to Obtain Intoxilyzer 5000 EN Source Code

In an unpublished opinion issued by the Minnesota Court of Appeals on March 3, 2009 entitled State v. Thompson, Judge Stoneburner affirmed the district court's denial of an accused drunk driver's request to obtain and review the source code for the Intoxilyzer 5000 EN.

In Thompson, the driver challenged his conviction of misdemeanor driving while impaired, arguing that the district court abused its discretion in denying his motion to discover the source code for the Intoxilyzer 5000EN. Under the Minnesota Rules of Criminal Procedure, in misdemeanor cases, any discovery beyond police investigatory reports is by consent of the parties or motion to the district court. Under the rule, the district court may exercise its discretion and require the prosecution to disclose material and information if the defendant shows that the information may relate to the guilt or innocence of the defendant or negate the guilt or reduce the culpability of the defendant as to the offense charged.

Thompson argued that the Intoxilyzer was “the State’s only witness” and asserted that he is entitled to “conduct a full examination” of this witness. He argued that he cannot assess the reliability of the testing method without access to the source code. He asserted that he has shown the relevance of the source code to his guilt or innocence in a manner sufficient to make the district court’s denial of its discovery an abuse of discretion. The Court of Appeals, however, disagreed, relying on the State's expert, who stated:

In the field of forensic toxicology, validation of analytical methodologies for analyzing alcohol and other drugs in the human body is performed exclusively without access to analytical instrument software source code . . . . I have never heard or read of a validation of a toxicological analysis method that was performed with access to the software source code of the analytical instrumentation. I also am unaware of any articles in peer review journals describing the necessity for access to source codes for any validation tests.

Judge Stoneburner opined:

Thompson has not shown the existence of any validation method that requires the source code; has not explained why existing reliability testing (that does not require the source code) is insufficient to establish the reliability of the instrument used in his test; and has not explained how the source code could invalidate existing reliability testing. On this record, we cannot conclude that the district court abused its discretion by denying Thompson’s request for discovery of the source code.

Why do we defense lawyers continue to push for the disclosure of the Intoxilyzer source code? It's actually pretty simple. The code is the hub between a breath sample and the method by which those samples are afforded a numerical value. Remember your math teacher demanding that you "show your work?" The Intoxilyzer manufacturer (obviously intending to protect what it believes to be valuable intellectual property) continues to refuse to show its work. How, then, can the court understand whether the results offered by a machine are inherently reliable?

Minnesota DWI Suspects Allowed to Intervene in Federal Intoxilyzer Lawsuit

Thanks to Barbara Jones, Associate Editor of the Minnesota Lawyer newspaper for publishing an article concerning U.S. District Court Judge Donovan Frank's decision to allow four DWI defendants to intervene in a lawsuit between the State of Minnesota and the manufacturer of the Intoxilyzer breath machine. That litigation involves access to the source code within the Intoxilyzer machine that is used to detect blood alcohol levels.

Jones' article outlines the fact that Minnesota DWI lawyers are seeking the code, the State of Minnesota doesn't have it and the manufacturer won't produce it, calling it a "trade secret." A recent decision of the Minnesota Court of Appeals requires the state to disclose the code. The position of defense counsel is that we need the code in order to understand how the machine calculates blood alcohol levels and, therefore, how reliable the results actually are.

Keep track of the case progress in State of Minnesota v. CMI by periodically reviewing the docket.

EZ DWI Guide: Publication of the Minnesota Department of Public Safety

The National Highway Traffic Safety Administration in partnership with the Minnesota Department of Public Safety has published a summary of Minnesota DWI & DUI statutes entitled "EZ DWI: A Quick Reference Guide for the Enforcment of DWI and Related Statutes." If you've been charged with a DUI, we know you'll find this information helpful. Click to read the Minnesota DWI EZ Guide.