State v. Mac Cardwell

516 S.E.2d 388, 133 N.C. App. 496, 1999 N.C. App. LEXIS 601
CourtCourt of Appeals of North Carolina
DecidedJune 15, 1999
DocketCOA98-997
StatusPublished
Cited by11 cases

This text of 516 S.E.2d 388 (State v. Mac Cardwell) is published on Counsel Stack Legal Research, covering Court of Appeals of North Carolina primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
State v. Mac Cardwell, 516 S.E.2d 388, 133 N.C. App. 496, 1999 N.C. App. LEXIS 601 (N.C. Ct. App. 1999).

Opinion

GREENE, Judge.

Lynette Mac Cardwell (Defendant) appeals from her driving while impaired and reckless driving convictions.

On 26 April 1997 at approximately 7:00 p.m., Defendant was involved in a two-vehicle collision. Following the collision, Defendant was taken to Moses Cone Memorial Hospital (Moses Cone) in Greensboro, North Carolina, for treatment. Defendant’s treating physician at Moses Cone ordered testing of Defendant’s blood for its alcohol concentration. Defendant’s test results were subsequently made available to the State by the trial court upon a determination that it was necessary to the proper administration of justice. 1 On 18 December 1997, Defendant moved to suppress the results of her alcohol testing on the grounds that both the DuPont ACA Star Analyzer (Analyzer) utilized by Moses Cone to determine Defendant’s plasma-alcohol concentration and the ratio used to convert her plasma-alcohol concentration to the equivalent blood-alcohol concentration are unreliable.

At the hearing on Defendant’s motion, testimony was presented as to the chain of custody of Defendant’s blood samples. 2 Bryan Dellinger (Dellinger), the Moses Cone medical technologist who tested Defendant’s blood samples, testified as to his training and as to the proper operation of the Analyzer. Dellinger further testified that he removed Defendant’s plasma from her whole blood in a centrifuge, and then tested her plasma in the Analyzer to determine its alcohol content. Defendant’s plasma-alcohol concentration, according to the Analyzer, was 127 milligrams per deciliter.

Robert Milton Gay, M.D. (Dr. Gay), chief of pathology and clinical laboratory services at Moses Cone, testified during the hearing that *499 he was familiar with the Analyzer, and that it has been in use at Moses Cone for “probably 20 years.” Dr. Gay testified that the Analyzer is reliable, and that “[a] lot of hospitals use it for specific things. I would think that it would be relatively common in tertiary care medicine.” Dr. Gay further testified that a combination of elevated lactic dehy-drogenase (LDH) levels and other factors could cause a false high alcohol reading on the Analyzer. Dr. Gay testified he was convinced, from a review of Defendant’s medical records, that although Defendant had elevated LDH levels due to liver damage caused by the accident, no other factors were present which, combined with Defendant’s elevated LDH levels, could cause a false reading. “As I mentioned, another factor is required for [a false reading] to happen, and that’s an increase in lactate or lactic acid, and while there is no direct measurement of lactic acid here, there is evidence that [Defendant’s] lactic acid was not increased.” Dr. Gay summed up his testimony by stating that, in his opinion, nothing in Defendant’s medical record caused him to doubt the accuracy of the Analyzer’s results in this case. On cross-examination, Dr. Gay stated unequivocally that transfusions of saline, which had been administered to Defendant prior to the withdrawal of her blood samples, would not have affected the Analyzer’s results.

Richard W. Waggoner, Jr., Ph.D. (Dr. Waggoner), a forensic chemist with the North Carolina State Bureau of Investigation (SBI), was permitted to testify as an expert in forensic chemistry. Dr. Waggoner explained that testing plasma for alcohol concentration results in higher readings than the testing of whole blood for alcohol concentration, and, accordingly, plasma-alcohol content must be converted to its equivalent blood-alcohol content to ascertain whether the alcohol concentration of an individual’s blood is over the legal limit of 0.08. Dr. Waggoner testified that the SBI uses a ratio of 1 to 1.18 to convert the alcohol concentration of plasma into “whole blood results,” and has used this ratio for over ten years. Dr. Waggoner stated that a 1 to 1.18 ratio is considered scientifically reliable by other experts in the field of forensics. Approximately 90 percent of the published studies in journals and texts report accurate conversion ratios ranging from 1 to 1.15 through 1 to 1.21, although Dr. Waggoner was aware of one study which found one individual to have a conversion ratio of 1 to 1.59, and of one study which found one individual to have a conversion ratio of 1 to 1.35. Dr. Waggoner believed these figures to be unreliable “outliers” based on his review of numerous studies, encompassing a total of approximately one thousand individuals. Using the SBI’s conversion ratio of 1 to 1.18 to *500 convert Defendant’s plasma-alcohol concentration of 127 milligrams per deciliter, Dr. Waggoner testified that Defendant’s blood-alcohol concentration would be equivalent to 0.107. Using a conversion ratio of 1 to 1.21, the highest ratio Dr. Waggoner considered to be reliable, Defendant’s blood-alcohol concentration would be equivalent to 0.105. Even using a conversion ratio of 1 to 1.35, a ratio Dr. Waggoner considered unreliable, Defendant’s blood-alcohol concentration would be equivalent to 0.094.

James Woodford, Ph.D. (Dr. Woodford), a chemist, testified for Defendant as an expert in “medicinal and forensic chemistry.” In Dr. Woodford’s opinion, the Analyzer is not a reliable method of determining blood-alcohol concentration. Dr. Woodford testified that, in his experience with drug-testing for federal employment, alcohol concentration results obtained from enzyme tests such as the Analyzer may not serve as the basis for hiring or firing decisions unless the results are verified by gas chromatography testing. Dr. Woodford also believed the Analyzer to be unreliable because it tests for a reaction which can be caused by alcohol, but which can also be caused by other factors, including enzymes. Dr. Woodford opined that the damage to Defendant’s liver could have released enzymes which would affect the Analyzer’s reading. In addition, Dr. Woodford believed the Analyzer’s results were unreliable in this case because Defendant had been given at least two units of saline solution, which is mostly water, prior to having her blood taken. Dr. Woodford testified that alcohol is attracted to water, and the water in the saline solution would have absorbed alcohol stored in Defendant’s muscle tissue, resulting in higher levels of alcohol in Defendant’s bloodstream. Dr. Woodford disputed the 1 to 1.18 conversion ratio utilized by the SBI, stressing that most published studies setting a ratio to convert plasma-alcohol content to blood-alcohol content apparently test healthy individuals (although he conceded that at least one of the relied-upon studies tested blood received from emergency room patients). Accordingly, Dr. Woodford felt that the conversion ratio of individuals in the studies could not accurately be applied to individuals, like Defendant, suffering from trauma.

Following the presentation of testimony, the trial court heard arguments from Defendant and from the State, noting that “[t]he State has the burden” of showing that the Analyzer is a reliable mechanism for testing alcohol concentration and that 1 to 1.18 is a reliable conversion ratio. The trial court subsequently made the following pertinent findings of fact as to the reliability of the Analyzer and the 1 to 1.18 conversion ratio:

*501 6.... The [Analyzer] is of very good reliability. Similar instruments have been in use for over 20 years.

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Cite This Page — Counsel Stack

Bluebook (online)
516 S.E.2d 388, 133 N.C. App. 496, 1999 N.C. App. LEXIS 601, Counsel Stack Legal Research, https://law.counselstack.com/opinion/state-v-mac-cardwell-ncctapp-1999.