OPINION
¶1 The juvenile, Roy L., appeals from denials of his motions to suppress and for judgment of acquittal and from his adjudication as a delinquent. For the reasons set forth, we affirm. We publish this decision for guidance in dealing with guns on or near school property.
FACTS AND PROCEDURAL HISTORY
¶ 2 At approximately 9:00 A.M. on April 16, 1999, Phoenix Police Officer Randall Goins, a resource officer at Alhambra High School, received a radio transmission from a school security guard that an Alhambra student, then at a market across the street from the school, had been showing a gun to several students. The security guard had obtained this information from another student earlier that morning. Goins met with the security guard on the east side of the campus, where the guard pointed out this juvenile as the suspect with the firearm. The juvenile was then standing on a corner in front of the market. Goins retrieved binocu *444 lars from his car and identified the juvenile as an Alhambra High School student.
¶ 3 Goins then got in his patrol car and drove to the market, keeping the juvenile in sight. As he approached the market, the juvenile began to walk around the north side of the market. The officer then drove around to the north side of the market, and the juvenile started going back towards its west side at a hurried pace. The officer noticed that the juvenile was a Hispanic male teenager wearing baggy white pants and an untucked blue shirt. He could not see a firearm.
¶ 4 Goins got out of his patrol car, pointed at the juvenile and yelled, “Hey you.” He drew his gun and, standing sideways from the juvenile, held it at his side behind his leg where the juvenile could not see it. The officer asked the juvenile to come over to his patrol car and talk to him. The juvenile walked towards Goins with his hands on his head. The officer asked, “Do you have a gun?” to which the juvenile responded, “Yeah.”
¶ 5 Goins then' brought his gun to “low-ready” position, approached the juvenile, and asked him to place his hands on the patrol car, which he did. The officer patted down the juvenile’s exterior clothing with his left hand and felt what he recognized to be the handle of a revolver-type weapon in the right front pants pocket. He asked, “Is this the gun?” to which the juvenile responded, “Yes, it is.” Goins then lifted up the juvenile’s shirt and saw a stainless steel six shot revolver protruding from his pocket. He removed the weapon, ensured that the juvenile had no other weapons, and placed him under arrest for carrying a concealed weapon. He asked the juvenile’s age, and the juvenile responded that he was sixteen. After the arrest, Goins handcuffed him, put him into the patrol car, and drove him to his office at the school, where he read him the juvenile Miranda rights, which the juvenile indicated he understood. He declined to have his parents present during questioning.
¶ 6 The juvenile told the officer that he had taken the gun from his father’s truck that morning because he had been threatened at gunpoint by a rival gang member the day before. The juvenile admitted that he knew it was against the law to carry the gun and that he had not seen the gang member who had threatened him. He was charged with being a minor in possession of a firearm in violation of Arizona Revised Statutes Annotated (“A.R.S.”) section 13-3111 (Supp.1998), a class 6 felony, and misconduct involving weapons in violation of A.R.S. section 13-3102 (Supp.1998), a class 1 misdemeanor. The second count was dismissed at the adjudication hearing. He filed a motion to suppress all direct and indirect evidence resulting from his stop, search and arrest, and all statements obtained in violation of
Miranda v. Arizona,
DISCUSSION
A. Denial of the Motion to Suppress
¶ 7 A trial court’s ruling on a motion to suppress will be reversed only for clear and manifest error.
See Maricopa County Juvenile Action No. JT30243,
¶ 8 A police officer with a reasonable and articulable suspicion that a person is involved in criminal activity may make a limited investigative stop.
See Terry v. Ohio,
A brief stop of a suspicious individual, in order to determine his identity or to maintain the status quo momentarily while obtaining more information, may be most reasonable in light of the facts known to the officer at the time.
¶9 The juvenile argues that the investigatory stop here was an unreasonable seizure under the Fourth Amendment because Goins lacked reasonable suspicion of any criminal activity. He claims that hearsay from an unidentified student is insufficient to justify a
Terry
stop. No precise definition exists for “reasonable suspicion.” Rather, the standard requires the “totality of the circumstances — the whole picture — [to] be taken into account.”
United States v. Cortez,
Articulating precisely what “reasonable suspicion” ... mean[s] is not possible. [It is a] eommonsense, nontechnical coneept[ ] that deal[s] with the “factual and practical considerations of everyday life on which reasonable and prudent men, not legal technicians, act.”
State v. Rogers,
¶ 10 Here, Goins received information from the school security guard that the juvenile had a gun in his possession. The security guard had been told that the juvenile had been showing the gun to others, and the guard was able to point the juvenile out to the officer. A tip from an informant can provide an adequate basis for a stop.
See Adams v. Williams,
¶ 11 Because the juvenile was wearing baggy clothes and an untucked shirt, Goins was unable to discern by looking at him whether he had a gun. When the officer drove to the market, the juvenile seemed to be trying to avoid him. These facts, together with the unidentified student’s statement to the security guard, gave Goins reasonable suspicion to stop the juvenile and inquire. The juvenile court properly concluded that the stop was justified under
Terry.
“The standard for determining the validity of a
Terry
stop is whether ‘a reasonably prudent [person] in the circumstances would be warranted in the belief that his safety or that of others was in danger.’ ”
State v. Blackmore,
¶ 12 We disagree with the juvenile’s argument that the stop exceeded the scope of a permissible
Terry
stop and became an illegal de facto arrest because Goins drew his weapon. “Police are permitted to draw their weapons when they have reasonable basis to fear for their safety; by doing so, they do not convert an investigative stop into an arrest.”
State v. Saez,
¶ 13 The juvenile also contends that the trial court erred in failing to suppress his statement that he had a gun on his person, which was made in response to Goins’ questioning prior to the
Miranda
warnings. Police officers are required to administer
Miranda
warnings prior to conducting “custodial interrogation.”
Miranda,
¶ 14 Although Goins had the requisite reasonable suspicion to stop the juvenile, he did
*446
not know that the juvenile was committing the crime of possession of a firearm until after he admitted that he was carrying a gun. The officer’s question as to whether he had a gun was therefore part of the investigation or determination as to whether a crime was being committed and so did not require a prior
Miranda
warning.
See State v. Tellez,
¶ 15 The officer’s question also fits within the public safety exception to the requirement that the police give
Miranda
warnings to a person in custody prior to interrogation. Voluntary responses to “questions necessary to secure [the officer’s] own safety or the safety of the public” may be admitted in court despite the lack of
Miranda
warnings.
New York v. Quarles,
¶ 16 Goins’ frisk of the juvenile after he admitted possessing the firearm was also proper. “Under
Terry,
an officer may lawfully frisk a person for weapons if the officer reasonably suspects that an individual may be armed and presently dangerous to the officer or others.”
In re Steven O.,
2. Denial of the Motion for Judgment of Acquittal
¶ 17 The juvenile also argues that the trial court erred in denying his motion for judgment of acquittal. He claims that the State failed to prove beyond a reasonable doubt all the elements of the crime charged. The juvenile was charged with violation of A.R.S. section 13-3111(A), possession of a firearm by a minor. “Firearm” is defined in A.R.S. section 13-105(17) (Supp.1998) as “any loaded or unloaded handgun, pistol, revolver, rifle, shotgun or other weapon which will or is designed to or may readily be converted to expel a projectile by the action of expanding gases, except that it does not include a firearm in permanently inoperable condition.”
¶ 18 The State never admitted into evidence the juvenile’s gun. Neither party elicited any evidence regarding its operability. The juvenile now contends that the State had to prove beyond a reasonable doubt that the gun was not permanently inoperable at the time it was removed from him. However, in
State v. Rosthenhausler,
¶ 19 Similar reasoning governs the juvenile’s claim that the State was required to prove the non-existence of the other exceptions to the firearm statute in A.R.S. section 13-3111(B). By excepting such activities as lawful hunting or shooting events, the legislature surely did not intend that failure to engage in such activities be an element of the offense.
See, e.g., Berryman,
¶ 20 The juvenile also argues that the State failed to prove guilt beyond a reasonable doubt when it offered no evidence that the crime took place in a county with a population in excess of 500,000 persons. Under A.R.S. sections 13-3111(H) and (A),
1
the gun prohibition “applies only in counties with populations of more than five hundred thousand persons according to the most recent decennial census.” Although the State presented evidence that the crime occurred in Maricopa County, it presented no evidence about its population. The members of this court work in Maricopa County, not on Mount Olympus. We may take judicial notice of a fact “so notoriously true as to not be subject to reasonable dispute.”
In re Anthony H.,
¶21 Finally, the juvenile contends that the trial court erred in denying his motion for judgment of acquittal because of uncontroverted evidence of a justification defense under A.R.S. section 13-401, that his life had been threatened the day before his arrest and that he was only carrying the weapon for self-defense. However, A.R.S. section 13-404 defines self-defense justification as follows:
A. Except as provided in subsection B of this section, a person is justified in threatening or using physical force against another when and to the extent a reasonable person would believe that physical force is immediately necessary to protect himself against the other’s use or attempted use of unlawful physical force.
A.R.S. § 13-404(A) (1989) (emphasis added).
¶ 22 The juvenile’s statements as to why he was carrying the gun were insufficient to raise reasonable doubt as to whether his actions were justifiable because there was no evidence that the use of force was immediately necessary.
See State v. Buggs,
*448 CONCLUSION
¶ 23 The trial court did not err in denying •the juvenile’s motions to suppress and for judgment of acquittal. The adjudication of delinquency and disposition are affirmed.
Notes
. On November 30, 1999, Division II of this court held this statute unconstitutional as special or local legislation.
In re Cesar R.,
