Opinion for the court filed by Circuit Judge BROWN.
Sаmuel Vinton, convicted of narcotics and firearm offenses after the contraband was found in a briefcase in his car during a traffic stop, appeals the denial of his motion to suppress. He argues the evidence was discovered during an unconstitutional search of his vehicle and property. In particular, he contends that
Arizona v. Gant,
— U.S. -,
I
On September 9, 2006, around 9:00 p.m., U.S. Park Police Officer William Alton, driving a marked cruiser in Southeast D.C., saw a green Nissan Maxima speeding, and also observed that its windows were excessively tinted. Tr. of Mot. Hr’g at 6, 8, 69, United States v. Vinton, No. 06-cr-298 (D.D.C. Feb. 9, 2007) (Suppression Tr.). As Alton followed the car, he noticed “a thin blue line sticker on the back of [the] car,” which Alton assumed referred to the driver’s probable affiliation with law enforcement, most likely the Metropolitan Police Departmеnt (MPD). Id. at 8, 70.
The driver promptly obeyed Alton’s signal to pull over and, as Alton approached the car, the driver, Vinton, lowered all his windows. Id. at 10, 70. Alton asked if Vinton was in law enforcement and Vinton said he worked in “personal security.” Id. at 11, 71. Alton immediately saw a knife with a five-and-a-half inch sheath on Vinton’s backseat, in “close proximity” to Vinton, easily within reaching-distance. Id. at 11-12, 25, 37, 70-71. Vinton explained the knife was used when fishing with his grandfather, but Alton saw no other fishing equipment in the car. Id. at 12, 14, 71. He retrieved the knife and placed it on the roof of the car, “out of arm’s reach of the driver.” Id. at 14, 71. Alton asked if there werе “any other weapons in the vehicle,” and Vinton responded “no, he ... ke[pt] that part of his trade at home.” Id. at 14, 71. Alton then measured the car’s windows with a tint meter and determined they exceeded D.C.’s seventy-percent tint limit. Id. at 15-17, 71. He returned to his cruiser to prepare a citation. Id. at 17, 72.
Officer Alton was working alone and had not called for Park Police backup. However, when an MPD officer appeared, Alton “asked him to stop” because he had found a large knife and desired assistance in conducting a protective search of the car. Id. at 19-20, 72. The officer told Alton there had been a double-stabbing homicide in the same vicinity approximately twenty hours earlier. Id. at 20, 72. Alton told Vinton he was going to conduct a search for weapons and asked twice more whether there were any weapons in the car; Vinton first responded “no” but then responded, “not that I know of.” Id. at 22, 73. Alton removed Vinton from the car and handcuffed him, but informed him he was not under arrest. Id. at 22, 73. A *19 search of the passenger compartment of the car revealed two cans of mace in the front armrest, a “butterfly knife” under the front passenger-side floor mat, a bag of Styrofоam earplugs, and a locked briefcase on the backseat. Id. at 23-24, 26, 73-74. Vinton claimed he used the earplugs as sleeping aids and said the briefcase did not belong to him and he was unaware of its contents. Id. at 26, 74. Officer Alton phoned headquarters to request guidance on how to proceed, and U.S. Park Police Investigator Hodge arrived shortly thereafter. Id. at 25-27, 74. Alton briefed him on the stop and Hodge conferred with a Park Police supervisor to assess whether Alton had probable cause to make an arrest. Id. at 27. They determined that he did. Id.
After placing Vinton under arrest for “possession of a prohibited weapon,” Officer Alton pried open the locked briefcase. Id. at 27, 29, 74-75. Inside, he found three bags of ecstasy, three pistol magazines, a “fighting knife ... like brass knuckles,” and a .45 caliber semiautomatic pistol, cocked and loaded. Id. at 29, 75.
Vinton was charged in a two-count indictment with unlawful possession with intent to distribute ecstasy, 21 U.S.C. § 841; and using, carrying and possessing a firearm during a drug trafficking offense, 18 U.S.C. § 924(c)(1). He moved to suppress all of the tangible evidence recovered, and all of his statements made, during the traffic stop. Following a hearing, the district court denied the motion. Mem. Op.,
United States v. Vinton,
No. 06-cr-298,
We review “determinations of reasonable suspicion and probable cause ...
de novo
” but “review findings of historical fact only for clear error and ... give due weight to inferences drawn from those facts by” the district court.
Ornelas v. United States,
II
The Fourth Amendment guarantees “[t]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures.” U.S. Const, amend. IV. “Time and again, [the Supreme] Court has observed that searches and seizures conducted outside the judicial process, without prior approval by judge or magistrate, are
per se
unreasonable under the Fourth Amendment — subject only to a few specifically established and well delineated exceptions.”
Minnesota v. Dickerson,
A
The Supreme Court has long “recognized that traffic stops are especially fraught with danger to police officers” and that the “risk of harm to both the police and the occupants [of a stopped vehicle] is minimized if the officers routinely exercise unquestioned command of the situation.”
Arizona v. Johnson,
— U.S.
*20
-,
Here, the facts that accumulated within the first few moments of the traffic stop established a particularized and objective basis for suspecting Vinton might be armed and dangerous. As an initial matter, Vinton does not argue that Officer Alton had an insufficient basis for pulling him over. Indeed, it is clear that Vinton was properly stopped because Officer Alton’s firsthand observations gave him probable cause to believe that Vinton had been speeding and driving with windows tinted in excess of the legal limit.
See
Suppression Tr. at 8, 69;
Whren v. United States,
Most crucially, upon approaching Vinton’s car, Officer Alton saw a knife with a five-and-a-half-inch sheath in plain view on the backseat, easily within reaching-distance of Vinton.
See
Suppression Tr. at 11-12, 25, 37, 70. “[T]he presence of one weapon may justifiably arouse concern that there may be more in the vicinity.”
United States v. Christian,
We reject Vinton’s argument that while a dagger may justify a protective
*21
search for additional weapons,
see Christian,
Finally, Vinton’s argument that Officer Aton did not subjectively believe Vinton was dangerous may easily be rejected. Because “[t]he Fourth Amendment test is objective,” an officer’s “actual subjective motives ... are irrelevant to the Fourth Amendment analysis of [a] traffic stop and protective search of the car.”
United States v. Washington,
B
“[A] warrantless arrest by a law officer is reasonable under the Fourth Amendment where there is probable cause to believe that a criminal offense has been or is being committed.”
Devenpeck v. Alford,
In the course of searching Vinton’s car for weapons, Officer Aton found, among other things, a “butterfly knife”
*22
hidden under the passenger-side floor mat.
See
Suppression Tr. at 23, 73. Vinton was eventually arrested for “possession of a prohibited weapon” (PPW), D.C.Code § 22-4514(b). Howеver, because the offense of PPW requires “proof of intent to use [the weapon]
unlawfully
against another,”
United States v. Broadie,
The CDW statute prohibits “carrying] within the District of Columbia either openly or concealed on or about their person ... any deadly or dangerous weapon.” D.C.Code § 22-4504(a). As we have explained, under District of Columbia case law, a “deadly or dangerous weapon” is “anything that is
‘likely
to produce death or great bodily injury by the use made of it.’ ”
Broadie,
“A
butterfly knife has a split metal handle which encases a single-edged blade. The knife is opened by folding back both halves to expose the blade.”
United States v. Kashiwabara,
The design of a butterfly knife makes it principally useful as an easily concealable
*23
and quickly deployable weapon capable of injuring another person in an altercation at close range.
See, e.g., Taylor v. United States,
In addition, the knife was hidden under the floor mat. See Suppression Tr. at 23, 73. Vinton’s various explanations — that maybe the knife fell inadvertently and landed under the mat, or perhaps it was stashed under the mat to prevent passersby from being enticed to break into the car to steal it — are, of course, possible. But Officer Alton was not unreasonable in believing that the likeliest explanation for the knife’s concealment was that Vinton intended to use it as a weapon and therefore wanted to hide it from police officers and potential adversaries. Furthermore, Vinton lied about the knife’s existence. Officer Alton asked Vinton three times whether there were any weapons in the car other than the sheathed knife, and each time Vinton responded in the negative. See id. at 14, 22, 71, 73. This lack of candor reasonably suggested to Officer Alton that Vinton intended to use the butterfly knife for malicious purposes. Thus, the totality оf the circumstances provided probable cause to believe Vinton was carrying a “deadly or dangerous weapon” in violation of D.C.Code § 22-4504(a).
Finally, Vinton argues that any finding of probable cause must be struck down because the facts supporting probable cause were uncovered only after unlawfully extending the
Terry
stop beyond a reasonable duration. “[A] search which is reasonable at its inception may
*24
violate the Fourth Amendment by virtue of its intolerable intensity and scope.”
Terry,
C
Until recently, it was widely understood that
New York v. Belton,
768 (1981), established a “bright-line rule,” whereby “incident to arrest the police may search the passenger compartment of an arrestee’s automobile.”
United States v. Wesley,
*25 During the protective search of Vinton’s car, Officer Alton found a locked briefcase on the backseat. See Suppression Tr. at 24, 26, 74. After placing Vinton under arrest, Alton pried it open. See id. at 29, 74-75. The government сoncedes that this search incident to Vinton’s arrest cannot be upheld under Gant’s safety rationale because Vinton was handcuffed at the time. See Appellee’s Br. 39. Nonetheless, the government argues the search should be upheld under Gant’s evidentiary rationale. 4
The Supreme Court did not elaborate on the circumstances when it will be “reasonable to believe evidence relevant to the crime of arrest might be found in the vehicle.”
Gant,
The Supreme Court explained that “[i]n many cases, as when a recent occupant is arrested for a traffic violation, there will be no reasonable basis to believe the vehicle contains relevant evidence. But in others, including
Belton
and
Thornton,
the offense of arrest will supply a basis for searching the passenger compartment of an arrestee’s vehicle and any containers therein.”
Gant,
The facts of this case establish that Alton was reasonable in expecting there might be additional weapons in the car, particularly in the locked briefcase found on the backseat. Most significantly, Officer Alton already had found
two
knives, one of which was hidden. He also had found two cans of mace and a bag of earplugs.
See id.
at 23, 26, 73-74. Of course, earplugs often are used for purposes unrelated to weapons, but, as Alton reasonably recognized, they also are commonly used at firing ranges to muffle the noise from guns.
See id.
at 26, 74. Thus, having found two objects, mace and earplugs, that suggested at least a possible association with weapons, along with two other objects, a sheathed knife and a butterfly knife, that were clearly capable of being used as weapons, Officer Alton had an objectively reasonable basis for believing that additional weapons might be inside the car. A material elеment of the CDW offense is that the defendant intends to use the object as a dangerous weapon.
See Lewis,
Ill
Vinton also argues his statements were admitted into evidence in violation of his rights under
Miranda v. Arizona,
Most of the statements Vinton claims were improperly admitted were made by him while he was sitting in his car, before Officer Alton handcuffed him and searched his car. This includes his statements that he worked in personal security, used the sheathed knife only for fishing with his grandfather, had no other weapons in the car, and “keeps that part of his trade at home.”
See
Suppression Tr. at 11-12, 14, 71. At the time he made these statements, Vinton was not “in custody” and faced an “ordinary,” “noncoercive” traffic stop.
See Berkemer,
Vinton also challenges the admission of two stаtements he made after being handcuffed for some time but before being formally arrested: that he used the earplugs as sleeping aids, and that he did not own the locked briefcase or know what was inside of it.
See
Suppression Tr. at 26, 74. We need not decide whether Vinton was “in custody” at the time he made these statements, because any
Miranda
violation was harmless beyond a reasonable doubt. Both of these statements were wholly exculpatory and could not have “contribute^] to the verdict obtained.”
United States v. Harris,
IV
For the foregoing reasons, the judgment оf the district court is
Affirmed.
Notes
. The district court at one point suggested the butterfly knife had "several different blades.” Suppression Tr. at 73. After being corrected, the court appeared to withdraw that finding. Id. at 77-78. Because the testimony estabfished that the butterfly knife had only one blade, and because both parties agree on this point, our analysis assumes the knife had only one blade. See id. at 23, 76-77.
. Vinton has not argued that the CDW statute is unconstitutional. Therefore, we have no occasion to address the issue and our holding expresses no view on it.
. Vinton argues that
Gant
also applies to
Terry
searches. Thus, he contends Officer Alton’s initial protective search of his car was unconstitutional because he was handcuffed at the time of the search. We decline to read
Gant
so expansively. The Supreme Court explicitly limited its holding to the search-incident-to-arrest context,
see Gant,
. The government also argues Vinton had no reasonable expectation of privacy in the briefcase, and consequently no protected Fourth Amendment interest in it, because he disclaimed ownership of it. We have no need to reach this issue.
. We note that
Gant
sometimes states that it must be reasonable to believe there will be evidence '‘of” the offense of arrest inside the car, and elsewhere speaks more broadly of evidence "relevant” to the offense of arrest.
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