OPINION OF THE COURT
In this appeal we consider whether a vehicle stop based on information provided by a witness who called 911 to report a shooting violated
Terry v. Ohio,
I.
A hard rain was falling in Harrisburg, Pennsylvania on the night of January 7, 2007 when Tammy Anderson noticed a taxicab pull into a parking lot across the street from her house and park next to a van. Though visibility was poor, Anderson was able to observe what appeared to be two men emerge from the vehicles and begin to fight. Watching this altercation develop from the doorway of her home, Anderson heard at least one gunshot ring out.
Upon hearing the gunshot, Anderson called 911 and told the police dispatcher: “I heard a gunshot. I seen [sic] two people wrestling on the ground and I don’t see them now. And there was a gunshot. I’m standing here on [sic] my front door.” When prompted by the dispatcher, Anderson provided her full name, her telephone number, and described the location of the parking lot. Although Anderson was unable to describe in any detail the individuals involved in the altercation, she said the taxi appeared to be white — possibly with tan paneling — and had a green light on its roof. While she was still on the phone, Anderson told the dispatcher that the taxi was departing from the parking lot and heading southbound on Seventh Street. The van, Anderson noted, remained in the lot and appeared to be unattended.
The information Anderson provided was dispatched to Harrisburg police officers on patrol that evening. Officer John Doll responded to the parking lot and confirmed that a van was parked in the lot. Doll arrived so quickly that Anderson, who was still on the phone, told the dispatcher that she saw a police car drive by. At about the same time, another officer reported that he had spotted a taxicab matching the description provided by Anderson heading southbound on Seventh Street approximately ten blocks away. After determining that no one remained with the van, Officer Doll proceeded southbound on Seventh Street in search of the taxicab.
Doll quickly tracked down the taxi, though he did not stop the vehicle immediately. Concerned that its occupants might be armed, Doll and other officers followed the taxi for several blocks to allow backup to join the pursuit. When the taxi turned onto Aberdeen Street, a narrow alleyway approximately two miles from the reported altercation, the officers initiated a traffic stop. The purpose of this stop, Doll testified at the suppression hearing, was to investigate the “shots fired call” and to ensure that no one in the taxicab was either armed or injured. Positioning their vehicles to block the exit to the alleyway, numerous officers surrounded the taxicab. Because the information relayed by the dispatcher indicated that the occupants of the taxi may have been involved in the reported shooting incident, the officers ap *446 proaehed the taxicab slowly, with guns drawn, while shouting for the occupants to exit the vehicle. According to Doll, such a response was “general practice” in such circumstances “in case somebody comes out of the vehicle with a gun ready to shoot.”
The police proceeded to clear and secure the vehicle. Riding in the backseat of the taxi with his young son was the Appellant, Anthony Johnson. After removing both Johnson and the taxi driver, Kenneth Cobb, the officers handcuffed both men, though neither was formally arrested at that time. Rather, Officer Doll testified at the suppression hearing that the police handcuffed the men so the officers could safely clear the vehicle and gather information about the shooting reported by Anderson. Surprised to discover Johnson’s eight-year-old son in the taxicab, the officers also removed him and placed him to the side.
After Johnson and Cobb were detained, another responding officer, Richard Gibney, approached the car. Though it was raining hard, the location was well-lighted and the taxicab’s interior dome light was on, illuminating the vehicle’s passenger compartment. Looking through a back window, Officer Gibney observed the butt of a Taurus .38 Special revolver protruding from an unzipped duffel bag on the taxicab’s rear seat, where Johnson had been sitting. After consulting with Officer Doll, Officer Gibney retrieved the weapon from the taxi and unloaded it, finding two spent shell casings inside.
Officer Doll then placed Johnson, a convicted felon, under arrest for possession of the gun and suspected involvement in the shooting and altercation reported by Anderson. After reading Johnson his Miranda rights, Doll began questioning him about the firearm and the shooting. Johnson declined to respond. A search of Johnson incident to his arrest revealed that he carried on his person marijuana, cocaine, and related drug paraphernalia.
Johnson was transported to the police station for booking, where he again encountered Officer Doll, who had traveled to the station separately. Although Doll did not attempt to question Johnson at the police station, Johnson began speaking to Doll during the booking process, admitting ownership of the revolver and duffel bag but denying responsibility for the shooting reported by Anderson. Johnson also attempted to persuade Doll to forego charging him with any drug offenses.
A grand jury indicted Johnson on a single count of illegal possession of a firearm by a person with three prior felony convictions in violation of 18 U.S.C. §§ 922(g)(1) and 924(e). After Johnson pleaded not guilty, the Government filed a superseding indictment, adding a single count of possession with the intent to distribute marijuana and cocaine in violation of 21 U.S.C. § 841(a)(1). Johnson then filed the motion to suppress at issue in this appeal, contending that the firearm, drugs, and any inculpatory statements made to Doll should be suppressed because the initial stop of the taxicab violated the Fourth Amendment’s prohibition against unreasonable searches and seizures. After the District Court denied his motion, Johnson conditionally pleaded guilty to violating 18 U.S.C. §§ 922(g)(1) and 924(e), reserving his right to appeal the District Court’s denial of his motion to suppress. The Distinct Court sentenced Johnson to 180 months incarceration and imposed a fine of $1,000, together with four years of supervised release.
II.
Johnson now appeals the District Court’s denial of his motion to suppress. The District Court had jurisdiction pursu *447 ant to 18 U.S.C. § 3231, and we have jurisdiction under 28 U.S.C. § 1291.
On appeal, Johnson claims the initial stop of the taxi was unconstitutional for two independent reasons. First, he argues that the stop of the taxi amounted to a
de facto
arrest which required probable cause that the information provided by Anderson could not provide. Alternatively, Johnson argues that the stop of the taxicab was not supported by reasonable suspicion because the information provided by Anderson was insufficiently detailed, particularized, and reliable. Examining the District Court’s factual findings for clear error,
United States v. Bonner,
III.
The Fourth Amendment prohibits “unreasonable searches and seizures .... ” U.S. Const, amend. IV. A traffic stop of a motor vehicle is a seizure of the vehicle’s occupants for the purposes of the Fourth Amendment.
Delaware v. Prouse,
A.
Johnson first contends that the evidence recovered from the taxicab and his statements to the police must be suppressed because the initial stop of the vehicle was not supported by probable cause.
1
Though Johnson acknowledges that police officers ordinarily may stop a vehicle based on reasonable suspicion alone,
see Prouse,
In certain circumstances, it can be difficult to distinguish between a
Terry
stop, which requires only reasonable suspicion, and a
de facto
arrest, which must be
*448
supported by probable cause.
See, e.g., United States v. Sharpe,
We likewise find unpersuasive Johnson’s argument that the stop constituted a
de facto
arrest because the police did not question the taxi’s occupants or check their identification before ordering them from the vehicle and handcuffing them. In
Terry,
the Supreme Court recognized that “it would be unreasonable to require that police officers take unnecessary risks in the performance of their duties.”
When an officer is justified in believing that the individual whose suspicious behavior he is investigating ... is armed and presently dangerous to the officer or to others, it would ... be clearly unreasonable to deny the officer the power to take necessary measures to determine whether the person is in fact carrying a weapon and to neutralize the threat of physical harm.
Id.
at 24,
In light of the foregoing, we conclude that nothing about the conduct of the Harrisburg police in this case rises to the level that we have previously required to constitute a
de facto
arrest under the Fourth Amendment. Accordingly, we decline Johnson’s invitation to subject the stop of the taxicab to the probable cause standard. Instead, we will evaluate whether the Harrisburg police had reasonable suspicion to stop the taxi and question its occupants regarding the shooting reported by Anderson.
See Prouse,
B.
Having ascertained the appropriate legal standard, we now consider the primary issue presented in Johnson’s appeal: whether the District Court erred when it held that the
Terry
stop of the taxicab was supported by reasonable suspicion.
Terry,
Here, the stop of the taxi and the seizure of its occupants were based almost exclusively on the information Anderson provided to the police. When a
Terry
stop is based on a tip provided by an informant, we must scrutinize the informant’s “veracity, reliability, and basis of knowledge” to determine whether the information relied upon by the police was sufficient to establish reasonable suspicion for the stop.
Id.
(quoting
Alabama v. White,
(1) the information was provided to the police in a face-to-face interaction, allowing an officer to assess directly the informant’s credibility;
(2) the informant can be held responsible if her allegations are untrue;
(3) the information would not be available to the ordinary observer;
(4) the informant has recently witnessed the criminal activity at issue; and
(5) the witness’s information accurately predicts future activity.
See id.
at 211 (citing
Brown,
Evaluating the totality of the circumstances in this case, we have little trouble concluding that the stop was supported by reasonable suspicion. Anderson — an innocent, uninvolved bystander — called 911 to report an ongoing altercation that involved gunfire. Though she did not speak face-to-face with a police officer, she freely and repeatedly provided the police dispatcher with her name and telephone number, and the location of her home. These data points enhanced Anderson’s credibility and the reliability of her report by allowing the police to hold her responsible if her tip ultimately proved false.
See Florida v. J.L.,
The details of Anderson’s 911 call also made clear that she was reporting not just recent, but
ongoing
criminal activity that she was observing during her emergency call.
See Nelson,
The reliability of an informant’s tip can be enhanced further by independent police corroboration of the information provided.
White,
In claiming that the police lacked reasonable suspicion to stop the taxi, Johnson relies principally on the decision of the Court of Appeals for the Fifth Circuit in
United States v. Jaquez,
The detailed information reported by Anderson — coupled with the officers’ independent corroboration of certain aspects of her tip — plainly distinguishes this appeal from
Jaquez.
Unlike the report in
Jaquez,
Anderson’s description of the vehicle was specific, providing the police with both the color and type of car involved in the shooting — a white taxi cab — and identifying one of its most distinctive features, a green roof light.
See Nelson,
Considering the totality of the circumstances, we conclude that Anderson’s tip, bolstered by the officers’ independent corroboration of certain details, was sufficiently reliable to provide the police with reasonable suspicion that the occupants of the taxicab in which Johnson was riding had been involved in the shooting reported by Anderson. Therefore, we hold that the officers’ decision to stop the taxi was “justified at its inception” in the present case.
Terry,
C.
A
Terry
stop that is supported by reasonable suspicion at the outset may nonetheless violate the Fourth Amendment if it is excessively intrusive in its scope or manner of execution.
United States v. Rickus,
Recognizing this, the Supreme Court in
Terry
emphasized that “our inquiry is a dual one” when assessing the constitutionality of an investigative detention such as the one at issue in this case.
Here, Johnson misdirects his criticism of the police officers’ conduct when he argues under step one that he was subjected to a
de facto
arrest by the Harrisburg police. Our cases indicate, however, that such complaints are more properly considered during the second step of the
Terry
analysis, when we scrutinize the relative intrusiveness of the officers’ conduct.
See, e.g., Edwards,
In
Terry,
the Supreme Court emphasized that a police officer conducting an investigative stop has an “immediate interest ... in taking steps to assure himself that the person with whom he is dealing is not armed with a weapon that could unexpectedly and fatally be used against him.”
Johnson’s chief complaint regarding the manner in which the stop was executed is that the police officers surrounded the vehicle, drew their weapons, shouted at the taxicab’s occupants, and subsequently handcuffed both him and Cobb. We have previously recognized that the “use of guns and handcuffs must be justified by the circumstances” that au
*453
thorize an investigative detention in the first place.
Baker,
In sum, the Harrisburg police officers took only “such steps as were reasonably necessary to protect their personal safety and to maintain the status quo during the course of the stop.”
United States v. Hensley,
IV.
For the foregoing reasons, the District Court did not err when it held that Johnson’s Fourth Amendment rights were not violated. Accordingly, we will affirm Johnson’s judgment of conviction.
Notes
. Johnson does not contend that the statements he made during this interaction with Officer Doll should be suppressed under Mi
randa v. Arizona,
. In its analysis of whether the police possessed reasonable suspicion to stop the taxi, the District Court credited the information provided by Anderson in part because she accurately "described [the cab's] most distinctive feature — the green light.” App. at 138. Johnson now argues that the stop of the taxi was not supported by reasonable suspicion because while Anderson indicated that the taxi she observed had a green roof light, the taxi in which he rode had a white roof light. Appellant's Op. Br. at 19. When questioned on this point at the suppression hearing, the taxi driver, Kenneth Cobb, was far from certain, testifying that he "assum[ed] it was a white light” and indicating that he "didn't recall it being green or anything like that.” App. at 103. Conversely, testimony from the officers involved in the stop suggested that the taxicab’s roof light was, in fact, green. App. at 69-70. Given Cobb’s equivocal suggestion that the light was actually white, coupled with the fact that Cobb and Johnson were longtime friends and coworkers who had served prison time together, App. at 103-05, the District Court's decision to reject Cobb's description of the color of the light was not clearly erroneous.
See Bonner,
