GARFF, Judge:
Appellant, Jeffrey W. Rochell, appeals from a conviction of possession of a controlled substance. We affirm.
FACTS
The court's findings of fact are undisputed and are supported by the record.
Trooper David V. Maycock stopped Rochell for driving sixty-five miles per hour in a fifty-five mile per hour zone. Rochell exited his car and walked toward the police car, meeting Maycock halfway between the two vehicles. Rochell's passenger, Billy G. Miller, remained in the car. Maycock noticed the smell of alcohol on Rochell's breath. When asked whether he had been drinking, Rochell admitted that he had drunk one beer.
Maycock asked Rochell for his vehicle registration. As Rochell opened the passenger door of his car in order to get the registration from the glove box, an open container of alcohol fell out the door, spilling its contents onto the ground. Maycock picked up the cup, sniffed it, and confirmed it had contained alcohol.
Maycock then spoke with Miller and determined that he also had alcohol on his breath.
Maycock cited Rochell for speeding, for not wearing a seat belt, and for violation of the open container law. He asked both Rochell and Miller whether they had any weapons. Miller said no, emptied his pockets, and turned around to show that he had no weapons. Rochell hesitated in answering and did not offer the contents of his pockets.
Maycock noticed a bulge in Rochell's left front pocket. He believed the dimensions of the bulge were consistent with those of a knife or other weapon. Maycock tapped the bulge and asked Rochell what it was. In reply, Rochell reached into his pocket and pulled out some keys. However, the bulge was still present. Again, Maycock tapped it, determined it was still hard, and asked what it was. Rochell again reached into his pocket. This time, he pulled out some coins, exposing a portion of a plastic bag.
Maycock asked Rochell what was in the bag. Rochell said "nothing," and pulled his hand holding the bag out of the pocket and placed it behind his back. A second officer, approaching from the rear, observed that the bag contained white powder, and seized it.
Maycock immediately arrested Rochell and administered his Miranda warnings. The officer inquired whether Rochell had "any other dope in the car." Rochell said "yes," and told Maycock where it was. Maycock then retrieved another bag of white powder from Rochell's car. Both bags were later determined to contain cocaine.
Rochell moved to suppress the evidence seized pursuant to the frisk and the vehicle search, arguing the frisk and search violated the Fourth Amendment of the federal constitution, and article I, section 14 of the Utah Constitution. After a hearing on the motion, the trial court denied the motion.
On April 15, 1992, Rochell plead guilty to the reduced offense of possession of a controlled substance, a third degree felony, in violation of Utah Code Ann. § 58-37-8(2)(a)(i) (Supp. 1992), on the condition that his right to appeal the order denying his motion to suppress be preserved. Rochell appeals the conviction.
REASONABLE SUSPICION TO DETAIN
Rochell agrees that Maycock justifiably stopped him for traveling sixty-five miles per hour in a fifty-five mile per hour zone. However, he claims Maycock exceeded his authority in detaining him in order to search him and his passenger.
Rochell is unclear as to precisely when he thought the detention became unreasonable. Thus, we first consider whether the searches of Rochell and his passenger were " 'strictly tied to and justified by' " the circumstances rendering the initial stop permissible. Terry v. Ohio, 392 U.S. 1, 19-20, 88 S.Ct. 1868, 1878, 20 L.Ed.2d 889 (1968) (quoting Warden v. Hayden, 387 U.S. 294, 310, 87 S.Ct. 1642, 1652, 18 L.Ed.2d 782 (1967) (Fortas, J., concurring)).
After an officer has lawfully stopped a vehicle for a traffic violation, the officer "may briefly detain the vehicle and its occupants while he examines the vehicle registration and the driver's license." State v. Schlosser, 774 P.2d 1132, 1135 (Utah 1989) (citing Delaware v. Prouse, 440 U.S. 648, 654, 99 S.Ct. 1391, 1396, 59 L.Ed.2d 660 (1979)). In addition, an officer may check for outstanding warrants "so long as it does not significantly extend the period of detention." State v. Figueroa-Solorio, 830 P.2d 276, 280 (Utah App. 1992); accord State v. Sepulveda, 842 P.2d 913, 917 (Utah App. 1992).
If the officer extends the detention beyond this point, we then consider whether the officer had additional reasonable suspicion to justify further detention. Terry, 392 U.S. at 19-20, 88 S.Ct. at 1878-79; State v. Johnson, 805 P.2d 761, 763 (Utah 1991); State Godina-Luna, 826 P.2d 652, 654-55 (Utah App. 1992).
Here, Maycock appropriately requested the vehicle registration and Rochell's driver's license. When Rochell opened the passenger door to remove the registration from the glove box, the cup of alcohol fell out of the car, triggering further reasonable suspicion that Rochell and his passenger had one, and possibly two, open containers of alcohol, and that Rochell had been consuming alcohol while driving. See Utah Code Ann. § 41-6-44.20(1) (2) (Supp. 1992). Further, both Rochell and Miller had alcohol on their breath and Rochell had admitted to drinking.
We agree with the trial court that these articulable facts are sufficient to show probable cause that Rochell had an open container of alcohol in his vehicle and that he had been drinking while driving, thus justifying further detention. The trial court thus correctly concluded that Maycock justifiably detained Rochell.
REASONABLE SUSPICION TO FRISK
Rochell claims the court erred in concluding Maycock had reasonable suspicion that Rochell may be armed and dangerous, such that Maycock could frisk him for weapons. Rochell does not challenge the court's findings, but rather claims the facts as found by the court do not support a finding of reasonable suspicion.
Although Maycock had probable cause to arrest Rochell at the time the open container fell to the ground, Maycock instead chose to cite him for speeding and failure to wear seat belts. Had Maycock arrested Rochell, Maycock could have conducted a lawful, warrantless search of Rochell's person and vehicle as a search incident to arrest.
Because the court made detailed findings, our task is to determine independently whether the facts support a conclusion of reasonable suspicion. State v. Munsen, 821 P.2d 13, 14-15 (Utah App. 1991), cert. denied, 843 P.2d 516 (Utah 1992). See State v. Mendoza, 748 P.2d 181, 183 (Utah 1987); State v. Carter, 812 P.2d 460, 466 n. 6 (Utah App. 1991), cert. denied, 836 P.2d 1383 (Utah 1992); see also State v. Thurman, 846 P.2d 1256, 1268-70 n. 11 (Utah 1993) (admissibility of evidence usually an ultimate conclusion of law, although it embodies several subsidiary rulings); United States v. Hernandez-Alvarado, 891 F.2d 1414, 1416 (9th Cir. 1989) (setting forth the generally held view that whether reasonable suspicion exists is a mixed question of fact and law, and the trial court's ultimate conclusion regarding reasonable suspicion is a legal conclusion which is reviewed de novo).
Terry v. Ohio, 392 U.S. 1, 88 S.Ct. 1868, 20 L.Ed.2d 889 (1968), established an exception to warrantless searches, including pat down searches. The frisk for dangerous weapons is "a carefully limited search of the outer clothing of such persons in an attempt to discover weapons which might be used to assault [the officer]." Id. at 30, 88 S.Ct. at 1884-85. The officer must limit such frisks to a search for dangerous weapons. Id. at 16 n. 12, 88 S.Ct. at 1877 n. 12.
The officer must justify a pat down search by "specific and articulable facts which, taken together with rational inferences from those facts, reasonably warrant that intrusion." Terry, 392 U.S. at 21, 88 S.Ct. at 1880. These facts and inferences may be interpreted "in light of [the officer's] experience." Id. Still, the test for reasonable belief to frisk is objective. See 3 W. LaFave, Search and Seizure § 9.4(a) n. 23 (1987 1993 Supp.). Finally, the search must be "confined in scope to an intrusion reasonably designed to discover guns, knives, clubs, or other hidden instruments for the assault of the police officer." Terry, 392 U.S. at 29, 88 S.Ct. at 1884.
Utah has codified a Terry stop and frisk: "A peace officer who has stopped a person temporarily for questioning may frisk the person for a dangerous weapon if he reasonably believes he or any other person is in danger." Utah Code Ann. § 77-7-16 (1990).
The court made the following findings regarding the objective facts relied upon by Maycock to frisk Rochell: That Rochell had been speeding, he had been drinking and driving, his companion had also been drinking, Rochell had been driving with an open container of alcohol in the front seat of the car, Rochell had been speeding, that upon being stopped, Rochell left his vehicle and walked toward the officer, Rochell had a bulge in his pocket, the officer believed the bulge could have been a weapon, and, when asked whether he had any weapons, Rochell "was hesitant in answering no."
See LaFave, § 9.4(a) n. 44-45 (citing People v. Allen, 50 Cal.App.3d 896, 123 Cal.Rptr. 80, 83 (1975) (pat down appropriate where suspect was peering in car window in parking lot late at night and had bulge in his pocket consistent with weapon); Commonwealth v. Wascom, 236 Pa. Super. 157, 344 A.2d 630, 632 (1975) (police justified in frisking man walking downtown at 12:35 a.m. with tagged clothing and television set with bulge in pocket consistent with knife)).
Here, the findings are undisputed, and, when analyzed in light of Maycock's training and experience, they constitute "specific and articulable facts which, taken together with rational inferences from those facts, reasonably warrant that intrusion." Terry, 392 U.S. at 21, 88 S.Ct. at 1880. Thus, Maycock justifiably frisked Rochell for a weapon. During this process, another officer saw a bag of cocaine in Rochell's hand and properly seized it.
SEARCH INCIDENT TO ARREST
Rochell does not challenge the lawfulness of his warrantless arrest pursuant to Utah Code Ann. § 77-7-2(1) (1990). Thus, the issue is whether the search and seizure of cocaine from Rochell's car was lawful because it was incident to his arrest.
Once an officer has made "a lawful custodial arrest of the occupant of an automobile," the officer "may, as a contemporaneous incident of that arrest, search the passenger compartment of that automobile." New York v. Belton, 453 U.S. 454, 460, 101 S.Ct. 2860, 2864, 69 L.Ed.2d 768 (1981). This search may include "the contents of any containers found within the passenger compartment." Id. at 460, 101 S.Ct. at 2864.
Here, cocaine on Rochell's person provided probable cause for arrest, independent of the contraband later seized from the vehicle. See Utah Code Ann. § 58-37-8(1) (2) (Supp. 1992). Also, Rochell and Miller were standing near the vehicle at the time of their arrest. While Rochell was not in the car at the time of his arrest, the car was "within [his] immediate control." Id. at 460, 101 S.Ct. at 2864. Thus, the court correctly concluded that the search of Rochell's vehicle was incident to his arrest, or that the search was pursuant to Rochell's consent.
Rochell claims he did not voluntarily consent to the search because the officers illegally exploited their prior illegal behavior when they seized cocaine from his vehicle. Because we determine that the detention and frisk were legal, the subsequent seizure was permissible.
Moreover, Rochell did not raise the issue of voluntariness of consent at his motion to suppress. He thus waives the issue. State v. Carter, 707 P.2d 656, 660-61 (Utah 1985); State v. Price, 827 P.2d 247, 248 n. 2 (Utah App. 1992); State v. Archambeau, 820 P.2d 920, 922 (Utah App. 1991).
CONCLUSION
In sum, the trial court correctly concluded that Officer Maycock legally (1) detained Rochell in order to search him and his passenger; (2) conducted a pat down search of Rochell's person; and (3) searched Rochell's vehicle. Affirmed.