Carlo Ferreira appeals from the district court’s decision affirming the magistrate’s order suspending Ferreira’s driver’s license for refusal to submit to a breath test. I.C. § 18-8002(4). For the reasons set forth below, we affirm.
I.
BACKGROUND
On August 31, 1997, at approximately 1:12 a.m., a Garden City police officer observed a vehicle traveling in excess of the posted 35 mph speed limit. The officer visually estimated the vehicle’s speed to be 45 mph, which was subsequently confirmed by a radar unit to be 47 mph. The officer effectuated a traffic stop of the vehicle.
The officer approached the vehicle and asked the driver for his license, registration, and proof of insurance. The driver verbally identified himself as Ferreira and produced his registration and proof of insurance. Ferreira did not have his driver’s license with him at the time of the stop. During this exchange, the officer detected an odor of alcohol and asked Ferreira if he had been drinking. Ferreira responded that when dining he had consumed two glasses of wine and a glass of cognac. The officer asked Ferreira to exit and step behind his vehicle so that field sobriety tests could be performed. Ferreira performed the tests. He obtained a maximum of six points on the horizontal gaze nystagmus test. He also swayed and placed his foot onto the ground while performing the one-leg stand test. Finally, during the heel-toe walking test, Ferreira could not remain in the heel-toe position during the instructional phase of the test, missed several heel-toe steps, raised his arms over six inches, took the wrong number of steps, and made an improper turn. Based on these observations, the officer determined that Ferreira was driving under the influence of alcohol and arrested him.
After transporting Ferreira to jail, the officer read Ferreira the I.C. § 18-8002(3) blood alcohol investigation advisory form. Ferreira stated that he did not understand that he had no right to consult with an attorney and requested that he be permitted to do so. The officer informed Ferreira that, under Idaho law, he did not have the right to speak with an attorney before submitting to the breath test. The officer then offered Ferreira a breath test, and Ferreira stated that he wished to have a blood test drawn. After *478 the officer informed Ferreira that he could have an independent blood test drawn at his own expense, following the breath test, Ferreira refused to submit to a breath test, stating that he was “not given ... the right to talk to my lawyer or my due process.” As a consequence of Ferreira’s refusal of the breath test, the officer seized Ferreira’s driver’s license as authorized by I.C. § 18-8002(4)(a).
Ferreira requested a hearing pursuant to I.C. § 18-8002(4)(b) to show cause why his driver’s license should not have been suspended. At the conclusion of the hearing, the magistrate ruled that Ferreira had failed to satisfy his burden under the statute and ordered his license suspended. Ferreira appealed to the district court, which affirmed. Ferreira again appeals.
II.
DISCUSSION
On review of a decision of the district court, rendered in its appellate capacity, we examine the record of the trial court independently of, but with due regard for, the district court’s intermediate appellate decision.
Hentges v. Hentges,
The hearing conducted below was a show cause hearing pursuant to I.C. § 18-8002(4), wherein Ferreira argued that his civil rights were violated by the officer’s request that Ferreira perform the field sobriety tests. Therefore, the show cause hearing was a
de facto
suppression hearing. The standard of review of a suppression motion is bifurcated. When a decision on a motion to suppress is challenged, we accept the trial court’s findings of fact which were supported by substantial evidence, but we freely review the application of constitutional principles to the facts as found.
State v. Atkinson,
Ferreira does not challenge the factual findings of the magistrate or the propriety of the initial traffic stop by the officer. He does challenge, however, the performance of the field sobriety tests on both state and federal constitutional grounds. The threshold issue raised by Ferreira’s appeal is what standard — probable cause or reasonable suspicion — is required before an officer may administer field sobriety tests. Ferreira contends that probable cause should be required under both the United States and Idaho Constitutions. He argues that the question with regard to the federal constitution is unsettled in Idaho and that the question with regard to the state constitution is one of first impression. Additionally, Ferreira asserts that, even if only reasonable suspicion is required, the officer did not possess such suspicion before he administered the field sobriety tests.
Idaho Code Section 18-8004 states, in relevant part:
(l)(a) It is unlawful for any person who is under the influence of alcohol, drugs or any other intoxicating substances, or who has an alcohol concentration of 0.08, ... or more, as shown by analysis of his blood, urine, or breath, to drive or be in actual physical control of a motor vehicle within this state, whether upon a highway, street or bridge, or upon public or private property open to the public.
With this statute in mind, we turn to Ferreira’s arguments.
A. Fourth Amendment
Ferreira contends that the Fourth Amendment requires probable cause to believe a driver is operating his or her vehicle in violation of I.C. § 18-8004 before field sobriety tests can be administered. 2 Ferreira’s argu *479 ment essentially states that because his reasonable expectation of privacy was intruded upon by the field sobriety tests, probable cause is required before such tests may be administered. Ferreira contends that field sobriety tests require the driver to perform maneuvers that are not regularly shown in public and expose to police and public view things that are not obvious through passive observation of a person. He asserts, therefore, that the law should require that an officer possess probable cause before field sobriety tests may be administered.
A seizure occurs — and the Fourth Amendment is implicated — when an officer, by means of physical force or show of authority, has in some way restrained a citizen’s liberty.
State v. Fry,
However, Ferreira’s contentions are only the beginning of the analysis. In order for the Court to address the quantum of suspicion required before an officer may administer field sobriety tests, it must first give constitutional dimension to such an encounter between police and the citizens of this state. Although there are three categories of encounters between citizens and the police,
State v. Knapp,
A search without a warrant is per se unreasonable unless it falls within one of the exceptions to the Fourth Amendment requirements.
Coolidge v. New Hampshire,
An individual who is accosted by a police officer and has his freedom to walk away restrained has been seized. Not all seizures of the person need be justified by probable cause to arrest for a crime; a police officer may, in appropriate circumstances and in an appropriate manner, detain a person for purposes of investigating possible criminal behavior even though there is no probable cause to make an arrest.
*480 Such a seizure is justified under the Fourth Amendment if there is an articulable suspicion that the person has committed or is about to commit a crime.
State v. Rawlings,
The factors to be considered in distinguishing an investigative stop from a de facto arrest include the seriousness of the crime, the location of the encounter, the length of the detention, the reasonableness of the officer’s display of force, and the conduct of the suspect as the encounter unfolds.
State v. Martinez,
Field sobriety tests are, by their very definition, done in the “field” typically on the side of a public thoroughfare and are ordinarily performed contemporaneously with a traffic stop. In the instant case, upon stopping Ferreira for speeding, the officer noticed the odor of alcohol and inquired as to Ferreira’s alcohol consumption that evening. After being informed that Ferreira had ingested two glasses of wine and a cognac, the officer requested that Ferreira exit the car and perform field sobriety tests. Those tests were performed immediately thereafter. Finally, although Ferreira testified that he did not believe he could refuse the request, that does not elevate the detention into a de facto arrest. In any investigative detention the individual is not free to leave; that element of compulsion is what distinguishes an investigative detention from a consensual encounter.
See Fry,
To determine whether a search conducted within an investigatory detention is reasonable and, therefore, constitutionally permissible, the Court must balance the state’s interest in conducting the search against the level of intrusion into an individual’s privacy that the search entails.
See State v. Reed,
Moreover, this Court has previously held that the Fourth Amendment requires only reasonable suspicion that a driver is driving while under the influence before an officer may request a driver to perform field sobriety tests.
See State v. Pick,
B. Idaho Constitution
Ferreira next claims that the Idaho Constitution should require probable cause before an officer may request a driver to perform field sobriety tests. He contends that such a tests are “full-blown searches.” Article I, Section 17 of the Idaho Constitution states, in relevant part, that the “right of the people to be secure in their persons ... against unreasonable searches and seizures shall not be violated.”
The language of Article I, Section 17 of the Idaho Constitution closely parallels that of the Fourth Amendment. This similarity in language, however, does not require this Court to follow United States Supreme Court precedent in interpreting our own constitution. “The reason is the federal and state constitutions derive their power from independent sources. It is thus readily apparent that state courts are at liberty to find within the provisions of their own constitutions greater protection than is afforded under the federal constitution as interpreted by the United States Supreme Court. This is true even when the constitutional provisions implicated contain similar phraseology. Long gone are the days when state courts will blindly apply United States Supreme Court interpretation and methodology when in the process of interpreting their own constitutions.”
State v. Christensen,
Generally, like its Fourth Amendment counterpart, Article I, Section 17 of the Idaho Constitution prohibits unreasonable searches and seizures.
Simmons,
Ferreira relies on decisions of the Oregon and Colorado Supreme Courts in support of his contention that the Idaho Constitution should require probable cause before field sobriety tests may be administered. Ferreira cites
State v. Nagel,
Having adopted
Terry
and its progeny in this state under the Idaho Constitution, we find no reason to abandon that doctrine today. Additionally, it is “generally accepted that a driver stopped on reasonable suspicion of driving under the influence may be subjected to [ ] field sobriety test[s], consisting of examination of his mental and physical dexterity.” 4 Wayne R. Lafave, Search And Seizure: A Treatise On The Fourth Amendment, § 9.2(f), at 54 n. 146 (3d ed.1996). In
Hulse v. State, Dep’t of Justice, Motor Vehicle Division,
Because we recognize that field sobriety tests, like investigative stops, are important investigative tools used by police officers to determine whether probable cause for arrest exists, we also acknowledge that to require probable cause that an individual has been driving under the influence before allowing police officers to administer field sobriety tests would defeat the very purpose of these tests.
Id.
at 86-87. We find the reasoning of the
Hulse
Court both compelling and sound. Moreover, in addition to Montana, at least fifteen other jurisdictions have adopted the rule that probable cause is not required before a law enforcement officer administers field sobriety tests.
See, e.g., State v. Superior Court,
Furthermore, Ferreira’s argument that an officer should be required to possess probable cause before field sobriety tests can be administered would render the “per se” section of I.C. § 18-8004 a virtual nullity. In Idaho, the legislature has seen fit to criminalize driving while under the influence in two distinct ways. Idaho Code Section 18-8004 states, in relevant part, that it “is unlawful for any person who is under the influence of alcohol, drugs or any other intoxicating substances,
or
who has an alcohol concentration of 0.08 ... or more ... to drive or be in actual physical control of a motor vehicle.” (Emphasis added.). Thus, I.C. § 18-8004 provides for one crime, with two alternative methods of proof.
See State v. Cheney,
We hold, therefore, that Article I, Section 17 of the Idaho Constitution requires only that a police officer possess reasonable suspicion that a person is driving in violation of I.C. § 18-8004 before field sobriety tests may be administered.
C. Least Intrusive Means
The investigative methods utilized during an investigative seizure should be the least intrusive means
reasonably
available to verify or dispel the officer’s suspicion in a short period of time.
State v. Martinez,
In
Pennsylvania v. Mimms,
Additionally, Ferreira’s own contention that there was no evidence that his motor skills were impaired while he was seated in the vehicle prior to the field sobriety tests, buttresses this Court’s conclusion that field sobriety tests are the least intrusive means of effectively verifying or dispelling an officer’s reasonable suspicion. The Hawaii Supreme Court has held that field sobriety tests are designed and administered to avoid the shortcomings of casual observation and are premised upon the relationship between intoxication and the externally manifested loss of coordination it causes.
State v. Wyatt,
Thus, Ferreira’s suggested “least intrusive means” of investigating a driver for DUI, by further questioning, is both unreasonable and potentially unreliable. Therefore, we hold that field sobriety tests are the least intrusive means
reasonably
available to verify or dispel the officer’s suspicion in a short period of time that a driver is in violation of I.C. § 18-8004.
See State v. Jones,
D. Basis for Field Sobriety Tests
Having determined that both the United States and Idaho Constitutions require reasonable suspicion that a driver is operating his or her vehicle while under the influence, or with an alcohol level in excess of .08, we turn to Ferreira’s contention that the officer in the instant case did not possess reasonable suspicion that Ferreira was driving in violation of I.C. § 18-8004. Ferreira argues that the odor of alcohol and Ferreira’s admission that he had two glasses of wine and a cognac prior to the traffic stop were insufficient to amount to reasonable suspicion to support the field sobriety tests. The reasonable suspicion standard requires less than probable cause, but more than mere speculation or instinct on the part of the officer.
State v. Naccarato,
In
Pick,
this Court held that the odor of alcohol on the driver’s breath, the driver’s slurred speech, and the driver’s admitted alcohol consumption amounted to reasonable suspicion that the driver was under the influence and, thus, the administration of field sobriety tests was constitutionally proper.
Pick,
Moreover, Ferreira’s assertion that his speech was not slurred and his clothes were not disheveled does not affect the officer’s reasonable suspicion that Ferreira was driving in violation of I.C. § 18-8004. As stated above, I.C. § 18-8004 provides for one crime with two alternative methods of proof — driving while under the influence of alcohol or driving with an alcohol level of .08 or more.
See Cheney,
III.
CONCLUSION
We hold that both the Fourth Amendment to the United States Constitution and Article I, Section 17 of the Idaho Constitution require reasonable suspicion that a driver is in violation of I.C. § 18-8004 before field sobriety tests can be administered. Further, we hold that field sobriety tests are the most reasonable, least intrusive method of confirming or dispelling an officer’s suspicion. Finally, we hold that, in the instant case, the officer possessed reasonable suspicion that Ferreira was driving in violation of I.C. § 18-8004 before administering the field sobriety tests. Therefore, the magistrate’s order suspending Ferreira’s driver’s license due to his refusal to submit to a breath test, pursuant to I.C. § 18-8002, is affirmed.
Notes
. In light of this standard of review, it is unnecessary for the Court to address Ferreira’s assertion that the district court erred in not ruling on his constitutional claims.
. Ferreira argues that Idaho has previously decided that the Fourth Amendment requires probable cause before field sobriety tests may be administered, and relies on
State v. Reichenberg,
