Background
A motorist called 911 after seeing a gray Mitsubishi Outlander swerving on a Pennsylvania road. The caller did not merely report a past event and disappear. He stayed on the phone with dispatch, followed the Outlander, provided continuing location updates, and later gave his real name, which authorities confirmed. Trooper Ryan Reeves caught up with the vehicles, passed the caller, verified the Outlander’s description, and stopped it. Thomas Gregory Magee was the driver and sole occupant.
Magee moved to suppress the evidence obtained after the stop. At the suppression hearing, the Commonwealth presented Trooper Reeves, but did not call the 911 caller. The Delaware County Court of Common Pleas granted suppression. It reasoned that the trooper had not personally witnessed erratic driving and treated the caller’s information as inadequate to establish reasonable suspicion. The Commonwealth appealed, certifying that suppression substantially handicapped or terminated its prosecution.
The parties agreed that the stop was an investigative detention governed by reasonable suspicion, rather than a stop requiring probable cause. The dispute was whether the caller’s contemporaneous report, as conveyed through the trooper’s sworn testimony, supplied specific and reliable information sufficient to justify the intrusion.
The Court’s Holding
The Superior Court reversed and remanded. Judge Panella explained that police need not personally observe suspicious conduct before making an investigative stop. Officers may rely on information from third parties, and the amount of corroboration needed depends on the tip’s reliability. An anonymous caller is treated with particular caution, but an identified citizen informant is ordinarily presumed trustworthy absent special circumstances because the person risks prosecution for making a false report.
The court found the case materially indistinguishable from Commonwealth v. Thran, where an identified caller reported a motorcycle swerving across the road and supplied a description and location. Here, the caller reported that Magee’s vehicle was “swerving all over the road,” remained in continuous contact with dispatch, accurately described the vehicle and its route, and personally observed the conduct while following immediately behind. Reeves corroborated the vehicle and location before activating his emergency lights. The caller then stopped behind the trooper and spoke with him at the scene. Those facts established the caller’s veracity, basis of knowledge, and the specificity of the report.
The Superior Court also rejected the premise that the Commonwealth had to produce the caller at the suppression hearing. Although prosecutors often call an identified informant, Pennsylvania precedent does not make that step mandatory. Reeves testified under oath about the information communicated to him, allowing the suppression court to assess whether the facts known to police amounted to reasonable suspicion. Because the trial court applied the wrong legal standard to reliable, contemporaneous information, suppression could not stand.
Key Takeaways
- An identified citizen’s contemporaneous 911 report can establish reasonable suspicion even when the stopping officer does not personally observe the reported erratic driving.
- Reliability strengthened as the caller stayed on the line, provided accurate route and vehicle details, disclosed his identity, and remained at the scene to speak with the trooper.
- The Commonwealth need not invariably call the citizen informant at a suppression hearing; sworn officer testimony can establish what police knew when they acted.
- Courts evaluate both the quality and quantity of tip information under the totality of the circumstances, with identified informants receiving more weight than anonymous tipsters.
Why It Matters
Magee gives Pennsylvania DUI and suppression practitioners a practical map for litigating citizen-reported driving cases. The opinion focuses on features that turn a bare accusation into a reliable report: firsthand observation, real-time updates, a verified identity, an accurate vehicle description, and the informant’s willingness to remain available. Police reports and suppression testimony should document each of those details rather than relying on the conclusory label “erratic driving.”
For defense counsel, the decision also identifies the factual pressure points. A caller who is anonymous, cannot explain the basis of knowledge, supplies stale information, or gives details that officers do not corroborate presents a different constitutional case. But where the caller follows the suspected driver and remains accountable at the scene, the officer is not required to watch dangerous weaving continue before intervening. Although the memorandum is nonprecedential, its close application of published Pennsylvania authority makes it useful guidance for trial courts confronting the recurring intersection of roadway safety and Article I, Section 8 protections.