THE APPROPRIATE TEST FOR WHETHER THE POLICE HAD “REASONABLE SUSPICION” SUFFICIENT FOR A TRAFFIC STOP BASED ON AN ANONYMOUS TIP IS THE “TOTALITY OF THE CIRCUMSTANCES;” THE CRITERIA INCLUDE THE AGUILAR-SPINELLI RELIABILITY AND BASIS OF KNOWLEDGE FACTORS (CT APP).
The Court of Appeals, in a full-fledged opinion by Judge Cannataro, over a two-judge dissent, applied the “totality of the circumstances” test and determined the police had probable cause to stop defendant’s car based upon an anonymous tip. The anonymous 911 caller told the dispatcher he was calling from a specified intersection and he had just been shot by two Black males in a white Mercedes. The caller said he knew the perpetrators and gave the dispatcher the address of one of them. A police officer four blocks away in a patrol car spotted a White Mercedes 30 to 60 seconds after the dispatcher broadcasted the report and stopped it. After the officer confirmed the address on the driver’s license was the address provided by the 911 caller, the officer asked if there were anything in the car he should know about. After the driver said “no, you can check the car” the officer saw a handgun and smelled gun powder through a gap in the locked glove compartment:
We have continued to apply the principles of Aguilar-Spinelli in the probable cause context … after the United States Supreme Court abandoned it in favor of the totality-of-the-circumstances approach (see Illinois v Gates, 462 US 213, 233 [1983] …), in recognition that Aguilar-Spinelli is more protective of our citizens’ rights under the State Constitution … . At issue here … is whether that same analysis is required for the lesser intrusion of an investigatory stop requiring reasonable suspicion. * * *
… [W]e now hold that the appropriate test is whether an anonymous tip is sufficiently reliable to provide reasonable suspicion under the totality of the circumstances. While this approach involves an analysis of the Aguilar-Spinelli reliability and basis of knowledge factors, “allowance must be made in applying them for the lesser showing required” to meet the reasonable suspicion standard .. . .
Here, the totality of the circumstances establishes that there was reasonable suspicion to stop defendant’s vehicle. The anonymous informant used the 911 system to report that he had “just been shot,” necessarily claiming personal knowledge of the crime. The caller also provided a description of the alleged shooter, the make and color of the shooter’s vehicle, and his location. The police were able to corroborate that information, within one minute of receiving the dispatch and within a block from the reported location, when they observed a car and suspect matching the description provided. The contemporaneous nature of the report is substantial here and weighs in favor of the caller’s veracity.
The police were duty-bound to investigate the radio report of a shooting, and they could not ignore their own contemporaneous observation of a vehicle matching the caller’s description and location. … [O]ur review of the reasonableness of the officer’s conduct is limited to the information known to the police at the time of the vehicle stop. … [T]here is record support for the affirmed finding of reasonable suspicion. People v Leighton R., 2025 NY Slip Op 06534, CtApp 11-25-25
Practice Point: Consult this opinion for insight into the application of the “totality of the circumstances” test to determine whether there was “reasonable suspicion” sufficient to justify a traffic stop based on an anonymous tip.
