delivered the Opinion of the Court.
¶1 On the Powell County side of McDonald Pass, Jerry Brander was arrested for driving under the influence of alcohol or drugs. He was subsequently charged with felony driving under the influence of alcohol or drugs; misdemeanor habitual traffic offender operating a motor vehicle; and misdemeanor careless driving. After entering a plea of not guilty, Brander moved the court to suppress evidence and to dismiss the charges. The District Court denied his motions. Pursuant to a plea agreement reserving his right to appeal the denial of the motions to suppress and dismiss, Brander changed his plea to guilty and was sentenced. Brander now appeals, claiming the District Court should have suppressed the evidence and dismissed the charges. We affirm.
¶2 Deputy Sheriff Roselles was in the Elliston area when he received a report from dispatch that it had received an anonymous tip of a drunk driver. The caller stated that Jerry Brander was driving drunk eastbound on his way to Stoner’s (a bar on Highway 12) in a brown Isuzu pickup with a topper and license plate number 28T-142. Finding no such vehicle at Stoner’s, Roselles continued east towards McDonald Pass. He soon encountered a dirty dark blue Isuzu pickup with a topper and license plate 28T-412, which was close to the description given by the anonymous caller. Roselles called dispatch to get an identification of the registered owner. He observed that the vehicle was moving slowly, at a rate of 30 to 35 mph in a 70 mph zone, and was meandering in its lane, swerving back and forth next to the fog line. It crossed the fog fine, and swerved again, partially crossing into the other eastbound lane without signaling and then back into the right hand lane. As the vehicle was approaching the county line at the top of the pass, Roselles initiated a vehicle stop. Approaching the truck, he could see a number of cases of beer in the back end, both opened and unopened. Roselles ordered Brander out of the truck, and it soon became apparent from his odor and behavior that Brander was intoxicated. Brander failed several field sobriety tests and a Portable Breath Test (PBT) revealed a Blood Alcohol Content (BAC) of 0.288. He was then arrested.
¶3 We review a district court’s denial of a motion to suppress evidence to determine whether the court’s finding that the officer had particularized suspicion to justify the investigative stop is clearly erroneous.
State v. Nelson,
¶4 The “reasonable grounds” standard for making an investigative
*486
stop under § 61-8-403(4)(a)(i), MCA, is the effective equivalent of the “particularized suspicion” test for an investigative stop under § 46-5-401, MCA.
Grindeland v. State,
¶5 Brander argues that Deputy Roselles could not justify an investigative stop on the basis of the information provided by the anonymous caller because the information did not meet the three-part test established in
State v. Pratt
(1997),
¶6 Brander asserts that, according to
State v. Lafferty,
*487 (1) objective data from which an experienced officer can make certain inferences; and (2) a resulting suspicion that the occupant of a certain vehicle is or has been engaged in wrongdoing or was a witness to criminal activity.
Thus the question is not whether any one of Brander’s driving aberrations was itself “illegal” but rather, whether Deputy Roselles could point to specific and articulable facts which, taken together with rational inferences from those facts, reasonably warrant the intrusion.
State v. Martinez,
¶7 Deputy Roselles testified that he was not certain that the vehicle he was stopping was the one referred to by the anonymous caller, but that based on his training and experience as a peace officer and his personal observations of the vehicle moving very slow, meandering and crossing the fog line, he suspected the driver was under the influence. The record supports the District Court’s conclusion that Deputy Roselles had a particularized suspicion to effectuate a vehicle stop of Brander.
¶8 Relying on
Hulse v. State,
particularized suspicion for the initial stop may also serve as the necessary particularized suspicion for the administration of field sobriety tests, providing the basis for the initial stop was of the nature that would lead an officer to believe that the driver was intoxicated. In other words, if an individual is driving erratically-e.g., if he is driving all over the road, crossing the center line and the fog line, weaving in and out of traffic, or braking for green lights-such evidence would serve as particularized suspicion both for the officer to initially stop the driver and to administer field sobriety tests.
Hulse, ¶ 39.
¶9 Here, Brander’s driving was sufficiently erratic to support Deputy Roselles’ particularized suspicion that Brander was driving *488 under the influence. Although Roselles did not notice the smell of alcohol emanating from Brander until after he and Brander walked to the back of his truck, Roselles already had formed a particularized suspicion, and he therefore had the authority to administer field sobriety tests. The order of the District Court is affirmed.
