|Justice WHITE delivered the opinion of the Court.
Based on an anonymous telephone tip, police stopped respondent's vehicle. A consensual search of the car revealed drugs. The issue is whether the tip, as corroborated by independent police work, exhibited sufficient indicia of reliability to provide reasonable suspicion to make the investigatory stop. We hold that it did.
On April 22, 1987, at approximately 3 p.m., Corporal B.H. Davis of the Montgomery Police Department received a telephone call from an anonymous person, stating that Vanessa White would be leaving 235-C Lynwood Terrace Apartments at a particular time in a brown Plymouth station wagon with the right taillight lens broken, that she would be going to Dobey's Motel, and that she would be in possession of about an ounce of cocaine inside a brown attaché case. Corporal Davis and his partner, Corporal P. A. Reynolds, proceeded to the Lynwood Terrace Apartments. The officers saw a brown Plymouth station wagon with a broken right taillight in the parking lot in front of the 235 building. The officers observed respondent leave the 235 building, carrying nothing in her hands, and enter the station wagon. They followed the vehicle as it drove the most direct route to Dobey's Motel. When the vehicle reached the Mobile Highway, on which Dobey's Motel is located, Corporal Reynolds requested a patrol unit to stop the vehicle. The vehicle was stopped at approximately 4:18 p.m., just short of Dobey's Motel. Corporal Davis asked respondent to step to the rear of her car, where he informed her that she had been stopped because she was suspected of carrying cocaine in the vehicle. He asked if they could look for cocaine, and respondent said they could look. The officers found a locked brown attaché case in the car, and, upon request, respondent provided the combination to the lock. The officers found marijuana in the attaché case and placed respondent under arrest. During processing at the station, the officers found three milligrams of cocaine in respondent's purse.
Respondent was charged in Montgomery County Court with possession of marijuana and possession of cocaine. The trial court denied respondent's motion to suppress, and she pleaded guilty to the charges, reserving the right to appeal the denial of her suppression motion. The Court of Criminal Appeals of Alabama held that the officers did not have the reasonable suspicion necessary under Terry v. Ohio, . . . to justify the investigatory stop of respondent's car, and that the marijuana and cocaine were fruits of respondent's unconstitutional detention. The court concluded that respondent's motion to dismiss should have been granted and reversed her conviction. . . . The Supreme Court of Alabama denied the State's petition for writ of certiorari, two justices dissenting. . . . Because of differing views in the state and federal courts over whether an anonymous tip may furnish reasonable suspicion for a stop, we granted the State's petition for certiorari, . . . We now reverse.
Adams v. Williams, . . . sustained a Terry stop and frisk undertaken on the basis of a tip given in person by a known informant who had provided information in the past. We concluded that, while the unverified tip may have been insufficient to support an arrest or search warrant, the information carried sufficient “indicia of reliability” to justify a forcible stop. . . . We did not address the issue of anonymous tips in Adams, except to say that “[t]his is a stronger case than obtains in the case of an anonymous telephone tip,” . . .
Illinois v. Gates, . . . dealt with an anonymous tip in the probable-cause context. The Court there abandoned the “two-pronged test” of Aguilar v. Texas, . . . and Spinelli v. United States, . . . in favor of a “totality of the circumstances” approach to determining whether an informant's tip establishes probable cause. Gates made clear, however, that those factors that had been considered critical under Aguilar and Spinelli-an informant's “veracity,” “reliability,” and “basis of knowledge”-remain “highly relevant in determining the value of his report.” . . . These factors are also relevant in the reasonable-suspicion context, although allowance must be made in applying them for the lesser showing required to meet that standard.
The opinion in Gates recognized that an anonymous tip alone seldom demonstrates the informant's basis of knowledge or veracity inasmuch as ordinary citizens generally do not provide extensive recitations of the basis of their everyday observations and given that the veracity of persons supplying anonymous tips is “by hypothesis largely unknown, and unknowable.” . . . This is not to say that an anonymous caller could never provide the reasonable suspicion necessary for a Terry stop. But the tip in Gates was not an exception to the general rule, and the anonymous tip in this case is like the one in Gates: “[It] provides virtually nothing from which one might conclude that [the caller] is either honest or his information reliable; likewise, the [tip] gives absolutely no indication of the basis for the [caller's] predictions regarding [Vanessa White's] criminal activities.” . . . By requiring “[s]omething more,” as Gates did, ibid., we merely apply what we said in Adams: “Some tips, completely lacking in indicia of reliability, would either warrant no police response or require further investigation before a forcible stop of a suspect would be authorized,” . . . Simply put, a tip such as this one, standing alone, would not “ ‘warrant a man of reasonable caution in the belief’ that [a stop] was appropriate.” Terry, supra . . .
As there was in Gates, however, in this case there is more than the tip itself. The tip was not as detailed, and the corroboration was not as complete, as in Gates, but the required degree of suspicion was likewise not as high. We discussed the difference in the two standards last Term in United States v. Sokolow, . . .:
“The officer [making a Terry stop] ... must be able to articulate something more than an ‘inchoate and unparticularized suspicion or “hunch.” ’ . . . The Fourth Amendment requires ‘some minimal level of objective justification’ for making the stop. . . . That level of suspicion is considerably less than proof of wrongdoing by a preponderance of the evidence. We have held that probable cause means ‘a fair probability that contraband or evidence of a crime will be found,’ . . . and the level of suspicion required for a Terry stop is obviously less demanding than for probable cause.”
Reasonable suspicion is a less demanding standard than probable cause not only in the sense that reasonable suspicion can be established with information that is different in quantity or content than that required to establish probable cause, but also in the sense that reasonable suspicion can arise from information that is less reliable than that required to show probable cause. Adams v. Williams, supra, demonstrates as much. We there assumed that the unverified tip from the known informant might not have been reliable enough to establish probable cause, but nevertheless found it sufficiently reliable to justify a Terry stop. . . . Reasonable suspicion, like probable cause, is dependent upon both the content of information possessed by police and its degree of reliability. Both factors-quantity and quality-are considered in the “totality of the circumstances-the whole picture,” . . . that must be taken into account when evaluating whether there is reasonable suspicion. Thus, if a tip has a relatively low degree of reliability, more information will be required to establish the requisite quantum of suspicion than would be required if the tip were more reliable. The Gates Court applied its totality-of-the-circumstances approach in this manner, taking into account the facts known to the officers from personal observation, and giving the anonymous tip the weight it deserved in light of its indicia of reliability as established through independent police work. The same approach applies in the reasonable-suspicion context, the only difference being the level of suspicion that must be established. Contrary to the court below, we conclude that when the officers stopped respondent, the anonymous tip had been sufficiently corroborated to furnish reasonable suspicion that respondent was engaged in criminal activity and that the investigative stop therefore did not violate the Fourth Amendment.
It is true that not every detail mentioned by the tipster was verified, such as the name of the woman leaving the building or the precise apartment from which she left; but the officers did corroborate that a woman left the 235 building and got into the particular vehicle that was described by the caller. With respect to the time of departure predicted by the informant, Corporal Davis testified that the caller gave a particular time when the woman would be leaving, . . . but he did not state what that time was. He did testify that, after the call, he and his partner proceeded to the Lynwood Terrace Apartments to put the 235 building under surveillance, . . . Given the fact that the officers proceeded to the indicated address immediately after the call and that respondent emerged not too long thereafter, it appears from the record before us that respondent's departure from the building was within the timeframe predicted by the caller. As for the caller's prediction of respondent's destination, it is true that the officers stopped her just short of Dobey's Motel and did not know whether she would have pulled in or continued past it. But given that the 4-mile route driven by respondent was the most direct route possible to Dobey's Motel, . . . but nevertheless involved several turns, . . . we think respondent's destination was significantly corroborated.
The Court's opinion in Gates gave credit to the proposition that because an informant is shown to be right about some things, he is probably right about other facts that he has alleged, including the claim that the object of the tip is engaged in criminal activity. . . . Thus, it is not unreasonable to conclude in this case that the independent corroboration by the police of significant aspects of the informer's predictions imparted some degree of reliability to the other allegations made by the caller.
We think it also important that, as in Gates, “the anonymous [tip] contained a range of details relating not just to easily obtained facts and conditions existing at the time of the tip, but to future actions of third parties ordinarily not easily predicted.” . . . The fact that the officers found a car precisely matching the caller's description in front of the 235 building is an example of the former. Anyone could have “predicted” that fact because it was a condition presumably existing at the time of the call. What was important was the caller's ability to predict respondent's future behavior, because it demonstrated inside information-a special familiarity with respondent's affairs. The general public would have had no way of knowing that respondent would shortly leave the building, get in the described car, and drive the most direct route to Dobey's Motel. Because only a small number of people are generally privy to an individual's itinerary, it is reasonable for police to believe that a person with access to such information is likely to also have access to reliable information about that individual's illegal activities. . . . When significant aspects of the caller's predictions were verified, there was reason to believe not only that the caller was honest but also that he was well informed, at least well enough to justify the stop.
Although it is a close case, we conclude that under the totality of the circumstances the anonymous tip, as corroborated, exhibited sufficient indicia of reliability to justify the investigatory stop of respondent's car. We therefore reverse the judgment of the Court of Criminal Appeals of Alabama and remand the case for further proceedings not inconsistent with this opinion.