OPINION
Jеrry Leon Purser appeals the trial court’s denial of his motion to suppress evidence seized under a search warrant. Defendant entered a conditional guilty plea to possession of a controlled substance with intent to distribute, a second degree felony, in violation of Utah Code Ann. §§ 58-37-8(1)(a)(iv) and 58-37-8(1)(b)(i) (1990), reserving the right to appeal the denial of his motion to suppress.
See State v. Sery,
FACTS
Narcotics detective Steve Sharp of the Salt Lake County Sheriff's Department requested a search warrant on August 23, 1990. He submitted an affidavit relating his belief that amphetamines, packaging and cutting matеrials, glassware, drug paraphernalia and other chemicals and materials used to manufacture a controlled substance would be found on defendant’s property.
The affidavit stated Detective Sharp had been contacted by a confidential informant (C.I.) who reported defendant was selling amphetamines at his residence and described defendant’s person, car and address. The C.I. stated he had observed illicit drug use, glassware, Bunsen burners, a light yellow liquid and chemicals inside defendant’s residence during the thirty days prior to the filing of the affidavit.
The affidavit further described how the C.I. assisted Detective Sharp in performing two drug buys through the use of an unwitting participant, within ten days prior to the filing of the affidavit. The C.I. picked up the unwitting participant, gave the unwitting participant money provided by Detective Sharp and received amphetamines from the unwitting participant after the unwitting participant entered the defendant’s residence. The unwitting participant told the C.I. that defendant sold the unwitting participant the amphetamines. Detective Sharp searched the C.I. for money and drugs before and after the controlled buys and both the C.I. and the unwitting particiрant were observed during the buys, except for the time the unwitting participant was in defendant’s residence. The C.I. received nothing for the information or assistance.
In the affidavit, Detective Sharp described his narcotics experience and stated that during the investigation, he observed рersons enter defendant’s residence and leave after only a few minutes, which suggested narcotics trafficking. He corroborated defendant’s identity through personal observation, police and driver’s license records and a registration check on defendant’s automobile. Police arrest records showed defendant had been arrested for possession of a controlled substance with the intent to distribute.
Detective Sharp requested a no knock, nighttime warrant, stating the evidence sought could be hidden or destroyed easily and that it would be safer for the offiсers to use darkness to conceal their approach. Detective Sharp based his safety concerns on information from the C.I. that defendant had spoken of weapons and on Detective Sharp’s observation of a sign at defendant’s house claiming: “This property insured by Smith аnd Wesson.”
The no knock, nighttime search warrant was issued and officers conducted the search at 9:12 p.m. on August 23, 1990. The officers seized two to three thousand amphetamine tablets, several fireárms and ammunition, packaging materials, scales, *517 drug paraphernalia, cash, marijuana seeds and other miscellaneous items.
Defendant moved to suppress the evidence seized, claiming the search warrant was defective because the supporting affidavit did not establish probable cause and did not support the no knock or nighttime authorization. Defendant also rеquested the identity of the C.I. to show the C.I. was unreliable and thus defeat probable cause. The trial court denied both motions and defendant appeals.
PROBABLE CAUSE TO SUPPORT SEARCH WARRANT
Defendant contends the affidavit supporting the search warrant was insufficient to establish probable cause. In particular, defеndant argues the C.I. was unreliable and the buys by the unwitting participant were not reliable, controlled buys because the unwitting participant was not searched before and after the purchases.
Before issuing a search warrant, a neutral magistrate must review an affidavit containing speсific facts sufficient to support a finding of probable cause.
State v. Babbell,
Factors to consider in determining whether probable cause exists include an informant’s veracity, reliability and basis of knowledge.
Gates,
In the instant case, the affidavit set forth information from the C.I. based on the C.I.’s personal observations, satisfying the “basis of knowledge” consideration of the totality-of-the-circumstanees test. The affidavit did not indicate whether the C.I. had been previously reliable. However, the circumstances as a whole indicate the C.I.’s information was reliable. The C.I. did not receive anything in exchange for the information provided, but rather volunteered the information to police. In addition, the
*518
C.I. described defendant’s appearance, house, vehicle and the contents of defendant’s house with detail and Detective Sharp independently corroborаted significant facts. Detective Sharp checked defendant’s address, vehicle registration and police record, thereby verifying all of the information given by the C.I., except for the items located in defendant’s house. Detective Sharp also personally observed defendаnt, defendant’s house and vehicle, and noticed persons enter defendant’s house and leave shortly thereafter, which based upon his experience was consistent with drug trafficking. “Having personally verified all but one piece of information provided by the informant, the officer thus had reasonable grounds to believe that the remaining piece ... was also true.”
Anderson,
Finally, the C.I. assisted officers in conducting two purchases, yielding amphetamines in the form of cross-top pills and a white powder, similar to those the C.I. personally observed in defendant’s residence. Officers searched the C.I. before and after each purchase and observed the C.I. throughout. However, because the unwitting participant was not searched, defendant claims the buys cannot be used to verify the information given by the C.I. The purpose of searching a participant before and after a controlled purchase is to prevent the participant from implicating innocent third persons in order to gain police favor or for other personal reasons.
Reyes v. State,
In defendant’s case, we need not question the unwitting participant’s reliability and veracity because the unwitting did not knowingly participate in the controlled purchases and acted against his/her own penal interest in making the purchase. Additionally, officers watched the unwitting participant continuously, with the exception of the short time the unwitting participant was in defendant’s residеnce.
Therefore, we conclude, based on the totality of the circumstances, that the affidavit established probable cause to believe drugs would be found at defendant’s residence.
NO KNOCK, NIGHTTIME SEARCH WARRANT
Defendant contends the no knock, nighttime warrant was not justified because the evidence sоught included drug manufacturing devices that could not be disposed of easily. Utah Code Ann. § 77-23-10 (1990) provides that a no knock warrant is justified only upon proof “that the object of the search may be quickly destroyed, disposed of, or secreted, or that physical harm may result to any person if notice were given.” In addition, the warrant must be served in the daytime unless the affidavit supports a finding that a nighttime search is necessary “to seize the property prior to it being concealed, destroyed, damaged or altered, or for other good reason.” Utah Code Ann. § 77-23-5 (1990).
Courts have allowеd no knock warrants because of the concern for destruction of evidence where “the affidavit suggests that a small, readily disposable quantity of drugs in a residence is the object of the search.” State
v. Rowe,
Where larger quantities of drugs or allegations of drug manufacturing are involved, the dеstruction justification may be less persuasive. However, because of the danger involved in dealing with those who are engaged in large-scale drug manufacturing and distribution, no knock, nighttime warrants are justified to allow officers the advantage of surprise, thus protecting
*519
their safety.
See State v. Lien,
In the instant case, the officers were searching for amphetamines, in the form of pills and powder; packaging and cutting materials; drug paraphernalia; glassware; and other .materials used to manufacture a controlled substance. Detective Sharp observed persons entering defendant’s house and leaving after only a few minutes, indicating drug trafficking. The C.I. reported that defendant spoke of weapons and Detective Sharp observed a sign stating: “This property insured by Smith and Wesson.” Thus, the affidavit set forth evidence of easily disposable drugs, talk and signs of weapons and evidence that the residence was being used as a drug outlet. The officers were searching for evidence that either could be easily hidden or destroyed, or that demonstrated possible danger to the officers. In addition, officers executed the warrant in the evening at a time when previous purchases took place and when defendant was likely to be home. Therefore, we conclude based on the facts in the affidavit, the no knock, nighttime warrant was justified. 1
DISCLOSURE OF C.I. AND UNWITTING PARTICIPANT
Finally, defendant argues that knowing the identities of the C.I. and the unwitting participant would have helped his defense; therefore, the identities should be disclosed. Defendant did not seek disclosure of the unwitting participant’s identity in the trial court and we will not consider the issue raised for the first time on appeal.
State v. Webb,
The Utah Supreme Court has clearly stated that “courts will not compel disclosure of the identity of an informant, who has supplied probable cause for the issuance of a warrant, where disclosure is sought merely tо aid in attacking probable cause” by attacking the reliability of the informant.
State v. Bankhead,
In conclusion, we hold there were sufficient facts in the affidavit in support of the search warrant to establish probable cause and to justify a no knock, nighttime warrant. Furthermore, we find no error in the trial court’s refusal to disclose the identity of the C.I. Therefore, we affirm defendant’s convictions.
BEÑCH and RUSSON, JJ„ concur.
Notes
. We distinguish the affidavit in this case from that in
Rowe,
We have not found any Utah statutes or cases defining "nighttime.” There are generally three views for determining what time is "nighttime.” The first view requires a factual determination of whether there is sufficient natural light that one can distinguish a person’s features.
See, e.g., State v. Burnside,
