Defendant appeals his conviction for driving while under the influence of intoxicating liquor (DUI), in violation of 23 V.S.A. § 1201(a)(2). We affirm.
I.
Viewed in light most favorable to the State,
State
v.
Jaramillo,
When defendant and his companion headed toward the bar, the officer crossed the street and asked them to return to their vehicle. They complied, and at the officer’s request, defendant produced his driver’s license and the vehicle’s registration. At this time, the officer observed several empty beer cans in the back of *186 the open truck as well as a twelve-pack of beer in the cab of the truck with one or two beers missing from the pack. The officer also noticed an odor of alcohol on defendant’s breath. As defendant attempted to pass something to his companion, the keys to the vehicle dropped to the ground. The officer picked up the keys and kept them in his possession. Defendant did not request their return. During this time, defendant commented that he had just been to another bar in town for “two beers” and that he and his companion were going to the bar across the street.
Following this exchange, the officer asked defendant to perform several dexterity tests. Defendant performed the tests, but not- to the satisfaction of the officer, who concluded that defendant had been operating his vehicle while under the influence of intoxicating liquor. Because the officer was on foot patrol, he radioed for assistance and told defendant that he would be taking him to the police station for DUI processing. At the station, defendant was read his Miranda warnings, and was administered a breath test at 11:33 p.m. The officer made additional observations that defendant’s eyes were bloodshot and watery, his speech slurred, and that he was unsteady on his feet. Another officer at the station made similar observations.
Prior to trial, defendant made timely motions to dismiss the case and to suppress any evidence obtained as a result of an alleged illegal arrest and confession. The trial court refused to dismiss the case or to suppress the test results. The court made no findings, however, as to whether there had been an illegal detention, but did suppress certain answers by defendant, finding that he had been given a defective Miranda warning.
At trial, the State’s chemist testified, over defendant’s objection, that based on his evaluation of defendant’s breath sample, he believed that defendant’s blood alcohol content (BAC) at the time of the test had been .16 percent. The chemist further testified that a person of defendant’s size would have had to consume a minimum of eight beers in order to achieve a BAC of .16 percent. The chemist also testified that where, as in the instant case, the breath test was taken nearly two hours after the operation of the vehicle, a person would have had to consume a minimum of three to four beers just prior to that operation in order to have a *187 BAC below .10 percent at the time of operation. 1 Defendant was found guilty of DUI, in violation of 23 V.S.A. § 1201(a)(2).
Defendant appeals, raising a number of issues: first, that the trial court erred in admitting defendant’s breath test result; second, that defendant’s right under the Fourth Amendment to the United States Constitution to be free from unreasonable searches and seizures was violated by the police officer’s initial investigation and subsequent processing of him for DUI; third, that the court’s pretrial findings were inadequate to support the denial of defendant’s motion to dismiss; and finally, that the evidence was insufficient to support a conviction.
II.
Defendant asserts that the trial court erred by admitting defendant’s test results without requiring that they be related back to the time of operation and without a limiting instruction as to their relevance. We have previously held that where no expert testimony has related the test result back to the time of operation of the vehicle, it is reversible error to admit the test result.
State
v.
Dumont,
While the breath test was properly admitted, an instruction to the jury regarding the inferences which could be drawn from it should have been given by the trial court. See
Rollins, 141
Vt. at 110,
Failure to object to an error in the jury instructions may foreclose appeal on this issue absent plain error. See
State
v.
Hoadley,
III.
Defendant also alleges that the police officer’s initial investigation and subsequent processing of defendant for DUI violated his Fourth Amendment right under the United States Constitution to be free from unreasonable searches and seizures.
2
We hold that while defendant was stopped and later arrested by the of
*189
ficer, defendant’s Fourth Amendment rights were not violated as the officer had sufficient cause at each step to justify his actions in accordance with the Fourth Amendment. What occurred in the instant case was an escalating situation, where each inquiry by the officer led to further evidence justifying further restraints on defendant’s freedom until probable cause existed to arrest defendant and process him for DUI. See, e.g.,
State
v.
Watson,
The police officer’s initial request that defendant return to the vehicle was no more than a routine street encounter which defendant was free to ignore without adverse consequences. See
Terry
v.
Ohio,
Nor did a Fourth Amendment seizure occur when the officer retained defendant’s car keys. See
United States
v.
Mendenhall,
Defendant was seized, however, within the meaning of the Fourth Amendment when the officer requested that defendant perform field dexterity tests in order to determine if he should be processed for DUI. See
State
v.
Little,
In order to satisfy the Fourth Amendment guarantees against unreasonable searches and seizures, the officer must be able to point to specific articulable facts which, taken together with rational inferences from these facts, reasonably warrants the intrusion.
Terry,
In order to justify a seizure on grounds less than probable cause, the seizure must be reasonable. See
Delaware
v.
Prouse,
After defendant failed to complete the dexterity tests satisfactorily, this evidence, combined with the other previously mentioned evidence, satisfied the probable-cause-for-arrest requirement of the Fourth Amendment. See
State
v.
Phillips,
In summation, the increasing level of defendant’s detention was justified by the officer’s increasing level of suspicion and cause to believe that a crime had been committed; therefore, no violation of defendant’s Fourth Amendment rights occurred as a result of the officer’s actions.
IV.
Defendant also alleges certain deficiencies in the trial court’s pretrial findings in ruling on defendant’s motion to dismiss. While the trial court failed to find specifically whether defendant was initially detained and subsequently arrested, thus requiring application of the protections afforded by virtue of the Fourth Amendment, we find that such failure does not necessitate reversal in the instant case. As previously discussed, we find that the officer had sufficient cause to justify each level of defendant’s detention, including probable cause to make the arrest. Thus, any deficiencies in the pretrial findings amounted to no more than harmless error. V.R.Cr.P. 52(a). See
State
v.
Burnham,
*193 V.
Finally, defendant asserts that the evidence admitted at trial was insufficient to warrant conviction, because there was insufficient evidence of defendant’s intoxication. In order to prove intoxication, the State need only prove that defendant had lost full control over the faculties of mind and body due to the effect of intoxicating liquor; the measure of that loss is immaterial. See
State
v.
LeBeau,
Affirmed.
Defendant’s motion for reargument pointed out certain factual inaccuracies in the published opinion. We are recalling the opinion to make the necessary corrections. These corrections do not affect either the result or the analysis of this opinion. Defendant’s motion for reargument, therefore, is denied.
Notes
This, in combination with other testimony by the arresting officer and defendant’s companion, tended to disprove a “chug-a-lug” theory: that defendant had consumed a large amount of alcohol immediately prior to his detention so that his BAC would have been less than .10 percent at the time he last operated his vehicle, but over that level almost two hours later when he was administered the breath test. Defendant’s companion testified that defendant had been drinking during the course of the evening. The chemist testified that a person of defendant’s size would have had to consume at least three beers within fifteen minutes of defendant’s last act of operation of his vehicle in order for his BAC to have been less than .10 percent at this last act of operation. Further, the arresting officer testified that defendant appeared to be under the influence of intoxicating liquor at the time of the initial confrontation.
Defendant has not argued any violation of his state constitutional rights under Chapter I, Article 11 of the Vermont Constitution; therefore, we will not discuss
*189
them herein. See
State
v.
Martin,
The subjective intent of the police officer to detain a defendant if he or she should attempt to leave is irrelevant to this analysis.
United States
v.
Mendenhall,
We do not hold that the seizure of a defendant’s personal effects can never rise to the level of seizure of a defendant for purposes of the Fourth Amendment. See
United States
v.
Place,
Examples of circumstances that might indicate a seizure, even where the person did not attempt to leave, would be the threatening presence of several officers, the display of a weapon by an officer, some physical touching of the person of the citizen or the use of language or tone of voice indicating that compliance with the officer’s request might be compelled.
State
v.
Badger,
While there appears to he no disagreement among the jurisdictions that requiring a defendant to perform field dexterity tests constitutes a seizure within the meaning of the Fourth Amendment, there is a split among the states as to whether or not a field dexterity test constitutes a search within the meaning of the Fourth Amendment. Compare
State
v.
Superior Court,
