*1097 Opinion
In this case we are asked to decide whether the Hitch 1 duty to preserve breath samples is based upon the federal or the state Constitution. As will appear, we conclude that the Hitch rule rests on the federal Constitution. We also conclude that there is no constitutional impediment to the introduction into evidence of intoxilyzer breath test results.
Background
Defendants were charged in municipal court with misdemeanor driving under the influence of intoxicating liquor. (Former Veh. Code, §§ 23101, subd. (a) or 23102, subd. (a); see now Veh. Code, §§ 23153, subd. (a), or 23152, subd. (a).) Their common law motions to suppress the evidence obtained from an intoxilyzer breath test were denied. In the Trombetta and Cox cases, the defendants appealed the order denying suppression to the superior court, which affirmed the order and then certified the cases for transfer to this court. In the Ward and Berry cases the defendants appealed their judgments of conviction to the superior court. The superior court affirmed and denied transfer to this court. On defendants’ petitions to the California Supreme Court for writs of habeas corpus, that court issued orders to show cause before this court why relief should not be granted.
This court held that the taking of a breath sample for testing by the intoxilyzer is the collecting of material evidence within the rationale of
Hitch,
and that pursuant to
Hitch,
federal due process requires that when the state collects such breath evidence, law enforcement agencies must establish and follow rigorous and systematic procedures to preserve the captured evidence or its equivalent for the use of the defendant.
1
2
{People
v.
Trombetta
(1983)
On petition by the state, the United States Supreme Court granted certiorari, and held that “Whatever duty the Constitution imposes on the States to preserve evidence, that duty must be limited to evidence that might be expected to play a significant role in the suspect’s defense. [Fn.] To meet this standard of constitutional materiality . . . evidence must both possess an exculpatory value that was apparent before the evidence was destroyed, and also be of such a nature that the defendant would be unable to obtain
*1098
comparable evidence by other reasonably available means. Neither of these conditions is met on the facts of this case.”
3
(California
v.
Trombetta, supra,
Our previous opinion assumed that the
Hitch
rule requiring the preservation of breath samples implemented a federal due process standard.
{People
v.
Trombetta, supra,
Discussion
i . Due Process
In Hitch the California Supreme Court held for the first time that there is a due process duty to preserve and disclose the component parts of a breathalyzer test (i.e., the test ampoule, its contents, and the reference ampoule), and that where such evidence cannot be disclosed because of its intentional but nonmalicious destruction, suppression of the test results is required unless the prosecution can show that the investigative officials have established and enforced rigorous and systematic procedures for the preservation of the evidence. {Id., 12 Cal.3d at pp. 652-653.)
The
Hitch
opinion makes no specific reference to either the state or the federal Constitution. As its point of departure, however, the opinion cites
Brady
v.
Maryland
(1963)
Only in fashioning a standard for determining when nonpreserved breathalyzer components should be deemed to have been exculpatory, for purposes of deciding a defendant’s claim for relief, did the
Hitch
court, lacking any federal precedent to guide it, turn by analogy to the materiality standard articulated in the California witness-informer cases.
{People
v.
Hitch, supra,
12 Cal.3d at pp. 648-649.) In so doing, we believe, the court was not invoking the state Constitution independently in support of the underlying duty to preserve the evidence, but rather, in the absence of any relevant federal precedent, was applying what it believed the proper standard to be.
6
Support for this conclusion is found in our Supreme Court’s recent decision in
In re Michael L.
(1985)
Notwithstanding
Hitch's
apparent federal origins, amici curiae, citing
Cordova
v.
Superior Court
(1983)
*1100
In
Cordova
the question was whether the United States Supreme Court’s decision in
United States
v.
Valenzuela-Bernal
(1982)
The Cordova analysis, by its terms applicable only to witness cases— cases whose origins expressly rest in both state and federal law (see fn. 6, ante)—is not dispositive of the issue here, i.e., whether the California Constitution dictates application of the informer-witness standard of materiality to nonpreserved breath-test components and specimens.
As indicated, we find that
Hitch
was premised on federal due process, and that the informer-witness standard of materiality was adopted in the absence of pertinent federal authority. We conclude, therefore, that unless and until our Supreme Court holds otherwise, the appropriate test to apply in determining the materiality of nonpreserved breath-test components and specimens is the federal due process test set forth in
California
v.
Trombetta.
(See
People
v.
Aguilar
(1985)
Because, as the United States Supreme Court held, the nonpreserved breath samples in this case were not material evidence, federal due process does not require suppression of the intoxilyzer test results. Consequently, we must now consider the issues left undecided in our first
Trombetta
opinion (see
People
v.
Trombetta, supra,
2. Equal Protection
Amici public defenders and defendants (hereafter defendants) assert that if due process does not require exclusion of the intoxilyzer breath test results, then individuals who provide breath samples are denied equal protection of the law by the Department of Health regulations, which require preservation of samples in other kinds of tests (Cal. Admin. Code, tit. 17, §§ 1219.1, subd. (g) [blood samples], 1219.2, subd. (c) [urine samples]; *1101 cf. Health & Saf. Code, § 436.64 [ampoules containing breath samples]), but not in intoxilyzer breath tests (see Cal. Admin. Code, tit. 17, § 1219.3).
Respondents and the Attorney General (the Attorney General) argue that defendants misread the regulations. Pursuant to the regulations, the Attorney General argues, the state is under no duty to collect and preserve an additional blood or urine sample for the defendant’s use, but is required only to retain any of the original sample that may be left after the state’s analyses. (See Cal. Admin. Code, tit. 17, §§ 1219.1, subd. (g)(2), 1219.2, subd. (c)(1).) The absence of a requirement that a breath sample be retained “simply reflects the fact that there is no remaining breath sample left to be retained” after analysis by the intoxilyzer.
We agree with the Attorney General that the regulations do not discriminate against individuals who select a breath test. Whatever test is chosen, whether blood, urine, or breath, the regulations require collection of only such amount of body sample as is necessary for analysis by the state. (See Cal. Admin. Code, tit. 17, §§ 1219.1, subds. (a), (b), 1219.2, subd. (a), 1219.3.) The difference in the regulations in requiring retention of the remaining sample of blood and urine, while failing to require retention of a breath sample (id., §§ 1219.1, subd. (g), 1219.2, subd. (c), 1219.3), merely reflects the fact that the intoxilyzer breath test exhausts the specimen, whereas tests of blood and urine ordinarily do not. 7 This difference, of itself, is of no constitutional significance.
Defendants, however, impliedly argue that regardless of the import of the regulations, equal protection requires the state to preserve a breath sample so that defendants who submit to an intoxilyzer breath test will have an equal opportunity to retest the evidence against them.
The principle of equal protection of the law requires equal treatment of persons similarly situated, not in the abstract, but with reference to a particular protected interest. (See Tribe, American Constitutional Law (1978) § 16-1, pp. 992-993; 5 Witkin, Summary of Cal. Law (8th ed. 1974) Constitutional Law, § 336, p. 3630, § 341, p. 3635.) “Exact equality is no prerequisite of equal protection of the laws within the meaning of the Fourteenth Amendment. . . . [t] ‘The Fourteenth Amendment enjoins “the equal protection of the laws,” and laws are not abstract propositions. They do not relate to abstract units A, B, and C, but are expressions of policy arising out of specific difficulties, addressed to the attainment of specific ends by
*1102
the use of specific remedies. The Constitution does not require things which are different in fact or opinion to be treated in law as though they were the same.’”
(Norvell
v.
Illinois
(1963)
Defendants characterize the interest at stake as the opportunity to have a sample of body substance for independent testing. Although in a limited sense this characterization is correct, in
Hitch
and its progeny, as here, the fundamental interest at stake is the defendant’s right to impeach the evidence against him or, stated more broadly, his right to a fair trial. (See
California
v.
Trombetta, supra,
In
Trombetta
the court first reviewed the procedures followed to ensure the accuracy of a particular intoxilizer breath test (467 U.S. at pp. 481-482 [81 L.Ed.2d at pp. 417-418,
The Supreme Court’s comments, although made in the context of a due process analysis, are germane as well to the issue of equal protection. Insofar as the record before us shows, the means of impeachment referred to above afford defendants a full and equal opportunity to impeach the intoxilyzer test results. In particular, we find no evidence to compel the conclusion that subsequent testing of a separate, preserved breath sample can effectively impeach the intoxilyzer test results. The briefs, petitions, and letters filed in this court reflect disagreement among the parties concerning the critical issues (1) whether the intoximeter field crimper-indium tube encapsulation kit referred to in our first
Trombetta
opinion
(id.,
In these circumstances we are unable to say that equal protection requires the state to preserve a breath sample for independent testing. We conclude, therefore, that just as failure to preserve a breath sample does not deprive defendants of a fair trial
(California
v.
Trombetta, supra,
*1104 3. Informed Consent
When defendants agreed to provide a breath sample, they were not advised that the intoxilyzer does not retain any sample for retesting. Defendants argue that failure to so advise them constitutes an independent violation of due process and equal protection.
In
People
v.
Mills
(1985)
We find the reasoning of the Mills court persuasive and dispositive of the informed consent issue.
Disposition
The appeals in the
Trombetta
and
Cox
groups of cases were taken from nonappealable orders before judgment and were therefore dismissed when previously before this court.
{People
v.
Trombetta, supra,
The Trombetta and Cox groups of appeals (A016358, A016374) are again dismissed. (Pen. Code, § 1466.) In the Ward and Berry proceedings (A017265, A017266), the petitions for writs of habeas corpus are denied.
Anderson, P. J., and Channell, J., concurred.
The petition of appellants and application of petitioners for review by the Supreme Court was denied January 16, 1986. Bird, C. J., and Grodin, J., were of the opinion that the petition and application should be granted.
Notes
People
v.
Hitch
(1974)
Unlike the breathalyzer used in Hitch, the intoxilyzer exhausts the captured breath specimen in testing it; hence, the court’s holding would require police at the time of the test to collect and retain an additional specimen in kits available for that purpose. (See People v. Trombetta, supra, 142 Cal.App.3d at pp. 141-142.)
The court found that the proven accuracy of the intoxilyzer and the California testing procedures made the chances “extremely low” that preserved samples would have been exculpatory
(California
v.
Trombetta, supra,
In footnote number 12 at this point, the United States Supreme Court stated: “State courts and legislatures, of course, remain free to adopt more rigorous safeguards governing the admissibility of scientific evidence than those imposed by the Federal Constitution. [Citations.]”
{California
v.
Trombetta, supra,
at p. 491 [81 L.Ed.2d at pp. 423-424,
In re Ferguson
(1971)
The California informer-witness cases, we observe, are founded on both federal and state law. (See, e.g.,
People
v.
Kiihoa
(1960)
The evidence indicates that with blood samples a sufficient sample remains for an independent test approximately 95 percent of the time, and with urine samples, approximately 75 percent of the time.
There is no dispute that a defendant always has the right on request and at his own expense to collect a contemporaneous sample with which to challenge prosecution evidence. (Veh. Code, § 13354, subd. (b).)
The Supreme Court’s reference to “operator error” notwithstanding, it appears that there is no operator manipulation associated with the intoxilyzer test: the defendant blows directly into the machine and the analysis is performed by the machine itself, with the results indicated on a printout card. Evidently it is for this reason that intoxilyzer tests, unlike blood and urine tests, can be performed by technically untrained officers. (See Cal. Admin. Code, tit. 17, § 1221.1, subd. (b)(1); cf. People v. Moore, supra, 34 Cal.3d at pp. 219, 221 [where the California Supreme Court recognized that technician error can significantly affect urine test results].)
"Police officers are now required by statute to advise defendants that breath-testing equipment does not retain any sample of the breath and that no breath sample will be available for independent analysis. (Veh. Code, § 13353.5, subd. (a); added by Stats. 1983, ch. 841, § 1, P- 3017.)
