Uрon trial to a jury the defendant, Robert J. Taylor, was found guilty of delivering marijuana, sentenced to imprisonment for 3 to 5 years, and fined $2,000. He has appealed and contends the trial court erred in (1) the admission into evidence of certain incriminating statements; (2) the admission into evidence of a taрe recording of the alleged drug transaction; (3) the failure to direct a verdict for the defendant on grounds that the evidence was insufficient to support a *115 guilty verdict; (4) the allowance of expert opinion testimony that the substance sold was marijuana; and (5) the instruction to the jury defining marijuana аnd the failure to instruct that the State had the burden to prove that Taylor’s acts were not statutorily excepted acts.
The evidence was such that the jury could find that the defendant sold an ounce of marijuana to an undercover agent for $70 on February 24, 1984. At the time the transaction took place, the undercover agent was equipped with a radio transmitter. The conversations between the defendant and the agent were recorded by a policeman stationed near the scene.
The defendant was arrested on June 2, 1984. While being “booked” at the police station, the defendant asked a detective, Timothy Schmitz, who had “narked him off.” Schmitz testified as follows concerning that conversation:
A. Robert Taylor asked me who narked him off.
Q. And what did you respond to that question?
A. I said, “Robert, you know I can’t tell you that.”
Q. Then what did he say?
A. He said, “Maybe I’ll find out and just waste somebody.”
Q. What did you say in response to that?
A. I said, “That kind of talk will just get you in more trouble than you’re already in.”
Q. What did he say?
A. He said, “It can’t get much worse than this.”
The defendant contends that it was error to receive this testimony over objection, in the absence of proof that the defendant had been advised as to his constitutional rights. Although the defendant was in custody at the time the statements were made, he was not being questioned in regard to the crime. The booking procedure involved questioning Taylor about statistical information and physical characteristics from a form sheet but did not involve questions about the facts or circumstances of the case. It was the defendant who volunteered a question about the case.
Miranda
v.
Arizona,
*116 [T]he prosecution may not use statements, whether exculpatory or inculpatory, stemming from custodial interrogation of the defendant unless it demonstrates the use of procedural safeguards effective to secure the privilege against self-incrimination. By custodial interrogation, we mean questioning initiated by law enforcement officers after a person has been taken into custody or otherwise deprived of his freedom of action in any significant way.
Miranda
does not require that volunteered statements be suppressed in the absence of the warnings: “Any statement given freely and voluntarily without any compelling influences is, of course, admissible in evidenсe.”
The trial court’s findings on a motion to suppress will not be disturbed on appeal unless, given the totality of the circumstances, they are clearly wrong.
State v. McCarthy,
Taylor was not induced or cоerced into making the statements. He was not interrogated about the crime as he was being booked into jail. An in-custody statement voluntarily made without the benefit of
Miranda
warnings is admissible if it is not the product of interrogation.
State
v.
Parsons,
Taylor’s second assignment of error involves the admission of the recording of the conversation during the drug delivery. Taylor complains that the tape recording should have been *117 excluded due to insufficient foundation and the fact that substаntial portions of the tape were inaudible.
We have held that “tape recordings of relevant and material conversations are admissible as evidence of such conversations and in corroboration of oral testimony of the conversations, provided proper foundation is laid.”
State
v.
Loveless,
At trial defense counsel objected on grounds that the tape was not shown to be valid or authentic and that the speakers on the tape were not properly identified. The undercover agent testified that the defendant was the person from whom he had purchased the marijuana and that the defendant was the only male spoken to during the course of the transaction. The jury heard the agent testify and also make the introduction to the tape. This would enable the jury to discern between the two male voices on the tape. The defendant’s mother’s voice was idеntifiable because of the conversation about hair dyeing. Other voices on the tape were merely incidental and did not relate to the drug transaction.
The trial court properly admitted the tape despite its less than perfect quality. Partial inaudibility or indistinctness does not require exclusion of a sound recording unless those portions are “ ‘so inaudible and indistinct that the jury must speculate as to what was said. . . .’ ”
State v. Loveless, supra
at 589,
In
Loveless, supra
at 589,
The defendant challenges the sufficiency of the evidence, claiming that, without the tape recording, there is only the uncorroborated testimony оf the cooperating individual to prove the delivery of a controlled substance. Neb. Rev. Stat. § 28-1439.01 (Cum. Supp. 1984) provides that “[n]o conviction for an offense punishable under sections 28-401 to 28-438 shall be based solely upon the uncorroborated testimony of a cooperating individual.”
Taylor was сonvicted under Neb. Rev. Stat. § 28-416(l)(a) (Reissue 1979) for knowingly or intentionally delivering the controlled substance of marijuana. In addition to the undercover agent’s testimony, a State Patrol investigator testified that before the agent approached Taylor he had no marijuana in his possession and that upon his return he possessed an ounce of the substance. While the investigators monitoring and surveying the scene did not visually observe the deliveries which took place inside Taylor’s home, they were able to corroborate the agent’s testimony about Taylor’s and his own movements. There was additional support for his testimony in photographs taken by one of the investigators and in the defendant’s statements to Detective Schmitz.
We have previously held that the statutory precursor identical to § 28-1439.01 “only requires that a conviction be based on something more than only a cooperating individual’s testimony.”
State v. Beckner,
A guilty verdict will not be reversed by this court on appeal unless the evidence is so lacking in probative force that it is insufficient as a matter of law.
State
v.
Ruzicka,
Similarly, there is no merit to the defendant’s-contention that expert opinion testimony identifying the substance obtained from Taylor as marijuana was improperly admitted. A general foundational objection does not reach the qualifications of an expert witness.
State v.
Bideaux,
Even if the qualification issue had been properly preserved at trial, we would find no merit in the defendant’s argument. The *120 expert who testified at trial was a forensic drug chemist. His training and background included: a bachelor of science degree in chemistry and microbiology; 8 years of experience as a forensic drug chemist, analyzing substances to determine the рresence of controlled substances; 3 to 4 months of intensive training by other chemists in the State Patrol laboratory; the performance of 9,000 to 10,000 different substance analyses to test for controlled substances content; and the performance of 5,000 to 6,000 substance analyses to test for mаrijuana content. After presenting this background and detailed descriptions of the tests run on the substances, the witness was permitted to testify that the substance obtained from the defendant was marijuana. There was adequate, foundation for the testimony.
The defendant’s final assignment of error pertains to the trial court’s jury instructions on the material elements of the crime and on the definition of marijuana. These claims are also without merit.
Section 28-416(l)(a) provides in part that “[ejxcept as authorized by this article, it shall be unlawful for any person knowingly or intentionally: (a) To . . . deliver ... a controlled substаnce.” The defendant argues that because the State has the burden to prove each essential element of the crime beyond a reasonable doubt, the jury should have been instructed that the State had to prove that his acts were not specifically excepted by the statute. The trial court correctly refused to so instruct the jury.
Neb. Rev. Stat. § 28-432(1) (Reissue 1979) of the Uniform Controlled Substances Act, Neb. Rev. Stat. §§ 28-401 et seq. (Reissue 1979 & Cum. Supp. 1984), provides:
It shall not be necessary for the state to negate any exemption or exception set forth in this article in any complaint, information, indictment or other рleading or in any trial, hearing, or other proceeding under the provisions of this article, and the burden of proof of any such exemption or exception shall be upon the person claiming its benefit.
In a similar situation we held that the State did not bear the burden of proof on the issue of exеmptions to a charge of unlawful sales of unregistered securities.
State
v.
Fries,
214
*121
Neb. 874,
Taylor argues that the record is devoid of evidence showing that he was not within a statutory exception. It is also devoid of any evidence to suggest that his acts were within an exception. The trial court correctly refused to instruct on the exceptions.
The defendant also requested that the jury be instructed as to the technical definition of marijuana found in § 28-401(14) (Cum. Supp. 1984). The court declined to do so and instead instructed that “ [m] arijuana is a controlled substance under the laws of Nebraska at the time alleged in the Information.” We addressed a comparable question in
State v. Ambrose,
In the present casе there was expert opinion testimony that the substance obtained was marijuana. Cross-examination of the expert did not refute the opinion, nor did the defendant present independent evidence tending to do so.
Reading the instructions as a whole, we conclude that the law was fairly presented and the jury was not misled.
State v. Perkins,
*122 The judgment is affirmed.
Affirmed.
