OPINION OF THE COURT BY
TANAKA, J.
Defendant Timothy E. Lowther (Defendant) appeals his conviction for driving under the influence of intoxicating liquor (DUI) in violation of Hawaii Revised Statutes (HRS)§ 291-4(a) (1) (1985).
The appeal raises the following question: Whether the approval of the intoxilyzer model 401 IAS breath testing machine (Intoxilyzer) by the Director of the State Department of Health (Director) bars a DUI defendant from attacking the general reliability of the Intoxilyzer by expert testimony.
Our answer is no. We therefore vacate the judgment of conviction and remand the case for retrial.
I.
On July 15, 1985, Defendant was arrested for DUI and submitted to an Intoxilyzer breath test. The test result showed 0.11 percent by weight of alcohol in Defendant’s blood.
During the jury
trial the test result was admitted into evidence without objection by Defendant. As the State’s expert witness, police criminalist Milton Chang, a certified Intoxilyzer operator/supervisor, testified that, in his opinion, the Intoxilyzer “is a reliable instrument.” 12/11/85 Tr. Vol. Ill at 61.
After the State rested, the trial court ruled on the pending “State’s Motion in Limine to Exclude the Testimony of Dr. Frajola.” The court determined that Dr. Walter J. Frajola would not be permitted to testify regarding the reliability of the Intoxilyzer but would be allowed to testify only as to “how the [breath] test was conducted” on Defendant and “as to the effects of alcohol on the human body.” 12/16/85 Tr. at 16.
During the direct examination of Dr. Frajola,
despite its earlier ruling on the State’s motion in limine, the trial court asked Dr. Frajola for his opinion regarding the general reliability of the Intoxilyzer. Dr. Frajola responded as follows:
It doesn’t accurately measure the amount of alcohol in a person’s blood. It can make an accurate measurement of a breath analysis, but the conversion from a breath result to a blood alcohol concentration is in tremendous error.
[I]t is an inaccurate measurement, when you refer it to a blood alcohol concentration in a specific individual.
12/17/85 Tr. at 153.
Upon the State’s objection, the court excused the jurors and Dr.
Frajola from the courtroom and heard the arguments of the parties. After the jurors returned to the courtroom, the court struck its last question and Dr. Frajola’s answer and stated to the jury:
Furthermore, the Court would like to instruct the jury that the question of the reliability of the Intoxilyzer has already been determined in this state by our State Supreme Court and has been laid to rest. It is reliable and, therefore, the last question and answer is to be completely disregarded by the jury.
Id.
at 163.
The matter, however, was not laid to rest. During its deliberations, the jury made the following request and inquiry:
2. May we have the decision of the Supreme Court ruling pertaining to the use of the Intoxilyzer.
3. Can the jury overule [sic] a decision of the Supreme Court?
Record at 237. The trial court refused the jury’s request and admonished the jurors that “they are not to question the law in the case as stated by the Court[.]” 12/19-20/87 Tr. at 6.
The jury found Defendant guilty as charged, and this appeal followed.
II.
The due process guarantee of a fair trial under the constitutions of both the United States and Hawaii requires that “criminal defendants be afforded a meaningful opportunity to present a complete defense.”
California v. Trombetta,
467 U.S. 479, 485, 104 S. Ct. 2528, 2532, 81 L. Ed. 2d 413, 419 (1984);
State v. Bullen,
63 Haw. 27, 620 P.2d 728 (1980). We hold that the trial court unconstitutionally excluded relevant expert testimony of Dr. Frajola proffered by Defendant.
A.
The State argues that the exclusion of Dr. Frajola’s testimony was proper because, as indicated by the trial court, our supreme court has determined in State
v. Tengan,
67 Haw. 451, 691 P.2d 365 (1984) that intoxilyzers are reliable devices. Both the trial court and the State have misread
Tengan.
The issue in
Tengan
was whether “the use of the Intoxiiyzer as a breath-testing device [had or] had not been authorized by a properly adopted rule.”
Id.
at 454, 691 P.2d at 368. The supreme court held that “the Director of Health approved the use of the Intoxiiyzer in accord with the requirements of Chapter 47 [of the Public Health Regulations] and informed the Director of Transportationf,]”
Id.
at 461, 691 P.2d at 372, whose letter to the Chief of the Honolulu Police Department “[i]n effect. .. constituted the Director of Transportation’s ‘approval’ of a breath test[.]”
Id.
at 462, 691 P.2d at 373.
One of the foundational prerequisites for the admission of the Intoxiiyzer test result into evidence is a “showing that the testing method is reliable[.]”
People v. Bowers,
716 P.2d 471, 473 (Colo. 1986). The effect of
Tengan
is to satisfy the “reliability” prong of the foundational requirements for admissibility.
See State v. Souza,
6 Haw. App. -, 732 P.2d 253 (1987). It relieves the State of the burden of presenting expert testimony regarding the general reliability of the Intoxiiyzer as a breath testing device in each DUI prosecution for purposes of admissibility of the test result. Nothing in
Tengan
suggests that the general reliability of the Intoxiiyzer is an unquestioned fact.
B.
Citing
State v. Vega,
12 Ohio St. 3d 185, 465 N.E.2d 1303 (1984),
the State contends that the reliability of the Intoxiiyzer has been legislatively resolved and is not subject to attack by Defendant. The
Vega
line of reasoning may be summarized as follows:
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OPINION OF THE COURT BY
TANAKA, J.
Defendant Timothy E. Lowther (Defendant) appeals his conviction for driving under the influence of intoxicating liquor (DUI) in violation of Hawaii Revised Statutes (HRS)§ 291-4(a) (1) (1985).
The appeal raises the following question: Whether the approval of the intoxilyzer model 401 IAS breath testing machine (Intoxilyzer) by the Director of the State Department of Health (Director) bars a DUI defendant from attacking the general reliability of the Intoxilyzer by expert testimony.
Our answer is no. We therefore vacate the judgment of conviction and remand the case for retrial.
I.
On July 15, 1985, Defendant was arrested for DUI and submitted to an Intoxilyzer breath test. The test result showed 0.11 percent by weight of alcohol in Defendant’s blood.
During the jury
trial the test result was admitted into evidence without objection by Defendant. As the State’s expert witness, police criminalist Milton Chang, a certified Intoxilyzer operator/supervisor, testified that, in his opinion, the Intoxilyzer “is a reliable instrument.” 12/11/85 Tr. Vol. Ill at 61.
After the State rested, the trial court ruled on the pending “State’s Motion in Limine to Exclude the Testimony of Dr. Frajola.” The court determined that Dr. Walter J. Frajola would not be permitted to testify regarding the reliability of the Intoxilyzer but would be allowed to testify only as to “how the [breath] test was conducted” on Defendant and “as to the effects of alcohol on the human body.” 12/16/85 Tr. at 16.
During the direct examination of Dr. Frajola,
despite its earlier ruling on the State’s motion in limine, the trial court asked Dr. Frajola for his opinion regarding the general reliability of the Intoxilyzer. Dr. Frajola responded as follows:
It doesn’t accurately measure the amount of alcohol in a person’s blood. It can make an accurate measurement of a breath analysis, but the conversion from a breath result to a blood alcohol concentration is in tremendous error.
[I]t is an inaccurate measurement, when you refer it to a blood alcohol concentration in a specific individual.
12/17/85 Tr. at 153.
Upon the State’s objection, the court excused the jurors and Dr.
Frajola from the courtroom and heard the arguments of the parties. After the jurors returned to the courtroom, the court struck its last question and Dr. Frajola’s answer and stated to the jury:
Furthermore, the Court would like to instruct the jury that the question of the reliability of the Intoxilyzer has already been determined in this state by our State Supreme Court and has been laid to rest. It is reliable and, therefore, the last question and answer is to be completely disregarded by the jury.
Id.
at 163.
The matter, however, was not laid to rest. During its deliberations, the jury made the following request and inquiry:
2. May we have the decision of the Supreme Court ruling pertaining to the use of the Intoxilyzer.
3. Can the jury overule [sic] a decision of the Supreme Court?
Record at 237. The trial court refused the jury’s request and admonished the jurors that “they are not to question the law in the case as stated by the Court[.]” 12/19-20/87 Tr. at 6.
The jury found Defendant guilty as charged, and this appeal followed.
II.
The due process guarantee of a fair trial under the constitutions of both the United States and Hawaii requires that “criminal defendants be afforded a meaningful opportunity to present a complete defense.”
California v. Trombetta,
467 U.S. 479, 485, 104 S. Ct. 2528, 2532, 81 L. Ed. 2d 413, 419 (1984);
State v. Bullen,
63 Haw. 27, 620 P.2d 728 (1980). We hold that the trial court unconstitutionally excluded relevant expert testimony of Dr. Frajola proffered by Defendant.
A.
The State argues that the exclusion of Dr. Frajola’s testimony was proper because, as indicated by the trial court, our supreme court has determined in State
v. Tengan,
67 Haw. 451, 691 P.2d 365 (1984) that intoxilyzers are reliable devices. Both the trial court and the State have misread
Tengan.
The issue in
Tengan
was whether “the use of the Intoxiiyzer as a breath-testing device [had or] had not been authorized by a properly adopted rule.”
Id.
at 454, 691 P.2d at 368. The supreme court held that “the Director of Health approved the use of the Intoxiiyzer in accord with the requirements of Chapter 47 [of the Public Health Regulations] and informed the Director of Transportationf,]”
Id.
at 461, 691 P.2d at 372, whose letter to the Chief of the Honolulu Police Department “[i]n effect. .. constituted the Director of Transportation’s ‘approval’ of a breath test[.]”
Id.
at 462, 691 P.2d at 373.
One of the foundational prerequisites for the admission of the Intoxiiyzer test result into evidence is a “showing that the testing method is reliable[.]”
People v. Bowers,
716 P.2d 471, 473 (Colo. 1986). The effect of
Tengan
is to satisfy the “reliability” prong of the foundational requirements for admissibility.
See State v. Souza,
6 Haw. App. -, 732 P.2d 253 (1987). It relieves the State of the burden of presenting expert testimony regarding the general reliability of the Intoxiiyzer as a breath testing device in each DUI prosecution for purposes of admissibility of the test result. Nothing in
Tengan
suggests that the general reliability of the Intoxiiyzer is an unquestioned fact.
B.
Citing
State v. Vega,
12 Ohio St. 3d 185, 465 N.E.2d 1303 (1984),
the State contends that the reliability of the Intoxiiyzer has been legislatively resolved and is not subject to attack by Defendant. The
Vega
line of reasoning may be summarized as follows:
An accused may not use expert testimony to attack the general reliability of intoxilyzers as valid, reliable breath-testing machines, in view of the fact that the General Assembly has legislatively provided for the admission of such tests if analyzed
in accordance with methods approved by the Director of Health.
City of Columbus v. Day,
24 Ohio App. 3d 173,174,493 N.E.2d 1002, 1003 (1985).
In our view, even if legislation validly provides for the admissibility of Intoxilyzer test results, their admissibility does not automatically equate with the sufficiency of the evidence to establish an unadmitted material fact.
See
Commentary to Rule 401, Hawaii Rules of Evidence (HRE), HRS Chapter 625 (1985). “[T]he Legislature may not declare the weight to be given to evidence or what evidence shall be conclusive proof of an issue of fact.”
State v. Burling,
224 Neb. 725, 730, 400 N.W.2d 872, 876 (1987).
See also State v. Boehmer,
1 Haw. App. 44, 613 P.2d 916 (1980). “[I]t is a judicial function to determine whether the evidence, if believed, is sufficient to sustain a conviction.”
Burling,
224 Neb. at 730, 400 N.W.2d at 876. Thus, the test results are not “unassailable.”
Keel v. State,
609 P.2d 555, 557 (Alaska 1980). Moreover, we doubt that the Intoxilyzer’s genéral reliability may be judicially noticed as an adjudicative fact by the trial court.
See
Rule 201, HRE.
Thus, we side with other courts that have recognized the defendants’ right to challenge the general reliability of breath testing devices. For example, an Alaskan court has held:
Even after the admission of the breathalyzer test results, the burden is still upon the municipality to convince the jury that • the breathalyzer test is accurate and that the defendant’s blood or breath alcohol was above the prohibited level at the time of driving. Should the defendant have reason to believe that the test results inaccurately reflect his actual blood or breath alcohol concentrations, he can adequately confront the test through the usual tools which he has at his disposal in confronting any witness or evidence. He can rely on the fact that the municipality has the burden of proof, he can rely on cross examination, or he can present evidence on his own.
Cooley v. Municipality of Anchorage,
649 P.2d 251, 255 (Alaska App. 1982). Although
Cooley
referred to a breathalyzer and not the Intoxilyzer, the above principles are applicable here.
See Commonwealth v. Smythe,
23 Mass. App. Ct. 348, 502 N.E.2d 162 (1987);
Hounsell v. Commissioner of Public Safety,
401 N.W.2d 94 (Minn. App. 1987);
State v. Burling, supra.
We find the dissenting opinion in
State v.
Vega
very persuasive. It states:
Under the Constitutions of the state of Ohio and the United States all persons accused of crime have the right to present their own evidence including expert testimony .... There is no prohibition against the presentation of expert medical testimony by the accused to show the nonexistence of any nexus between the test results and the physical condition of the accused.
The rule-making power of the Director of Health can never deprive a defendant of his constitutional right to present all relevant evidence in his defense to the crime with which he is charged.
12 Ohio St. 3d at 190, 465 N.E.2d at 1308.
III.
The State asserts that the trial court’s error was harmless beyond a reasonable doubt because there was sufficient evidence, other than the Intoxilyzer test result, to convict Defendant under HRS § 291-4(a)(l). We disagree.
The record seems to indicate that the jury reached its verdict on the HRS § 291-4(a) (1) count before it began its deliberation on the HRS § 291-4(a) (2)
count and made the request and inquiry referred to above. However, the record discloses that the trial court instructed the jury as follows:
The fact that 0.10 percent or more by weight of alcohol was in the defendant’s blood within three hours after the time of the
violation as shown by chemical analysis or other approved analytical techniques of the defendant’s blood or breath may be considered as competent evidence that the defendant was under the influence of intoxicating liquer [sic] at the time of violation.
Richard K. Perkins (Renee M.L. Yuen
with him on the briefs;
Yuen & Perkins,
Attorneys at Law, A Law Corporation, of counsel) for defendant-appellant.
Peter Van Name Esser,
Deputy Prosecuting Attorney
(Arthur E. Ross,
Deputy Prosecuting Attorney, and
Myles Breiner,
Law Clerk, on the brief) for plaintiff-appellee.
12/18/85 Tr. at 13 (footnote added). We are not convinced that the jury’s guilty verdict on the HRS § 291-4(a) (1) count was untainted by the foregoing instruction and the Intoxilyzer test result in evidence which Dr. Frajola was not permitted to question.
The general rule is that “any violation of a defendant’s constitutional rights is presumed prejudicial unless rebutted by the prosecution.”
State v. Caraballo,
62 Haw. 309, 323, 615 P.2d 91, 100 (1980). In our view, the State has failed to rebut the presumption.
IV.
The disposition of this appeal does not require our resolution of the other issues raised by Defendant.
Judgment of conviction vacated and case remanded for retrial.