Whether an anonymous telephone tip, corroborated by police observation of predicted innocent conduct, furnished reasonable suspicion for an investigatory stop under the Fourth Amendment.
Holding
Yes. Under the totality of the circumstances, the tip as corroborated bore sufficient indicia of reliability to justify the Terry stop.
Reasoning
An anonymous tip standing alone ordinarily does not establish either the caller's credibility or the basis of the caller's knowledge. The tip here did not itself explain why the caller was trustworthy or how the caller knew that White possessed cocaine. Thus, without further police work, it would not have justified a forcible stop.
The Court applied the totality-of-the-circstances approach used for informant tips in Illinois v. Gates, while recognizing that reasonable suspicion demands less than probable cause. Veracity, reliability, and basis of knowledge remain important considerations, but the quantum and quality of information needed for a Terry stop are lower than those needed for an arrest or a warrant.
Police corroborated meaningful portions of the tip before making the stop. They found the specifically described car at the identified building, watched a woman leave that building and enter the car, and observed her drive the most direct route toward the predicted destination. Although officers did not verify every detail, including White's name, her precise apartment, or whether she would actually turn into the motel, the corroborated facts were substantial enough for the reasonable-suspicion inquiry.
The most important corroboration involved the caller's prediction of White's future behavior. A tipster's ability to forecast that a person will shortly leave a particular location, use a particular car, and take a particular route to a stated destination suggests special familiarity with that person's affairs. That apparent inside knowledge gave the police reason to credit not only the caller's prediction but also the caller's allegation of criminal activity.
This was a close case, because the tip was less detailed and police corroboration less complete than in Gates. But reasonable suspicion is a less demanding standard than probable cause and may rest on information that is less reliable. Taken as a whole, the verified predictions gave the anonymous report enough reliability to support the stop.