WALD, Circuit Judge:

Appellant William D. Hill was arrested by police after he fled from his car carrying a gun following a traffic stop for allegedly failing to display a Vehicle Identification Number ("VIN") on the temporary tags of his recently purchased car. In the district court, Hill filed a motion to suppress the handgun discovered by police in the yard where he threw it after fleeing the car, arguing that it was the fruit of an illegal search. The district court denied the motion, and Hill entered a conditional plea of guilty to one count of unlawful possession of a firearm by a felon in violation of 18 U.S.C. § 922(g)(1) (1994). The district court imposed a sentence of 96 months in prison followed by a three-year term of supervised release. Hill now seeks review of the district court's denial of suppression of the handgun and challenges the sentence imposed by the court. We hold that the district court failed to apply the correct legal standard in determining that the traffic stop was legal and therefore denied Hill's motion to suppress on an improper ground. Additionally, we hold that the district court impermissibly relied solely on the indictment in concluding that Hill's prior conviction for attempted robbery constituted a "crime of violence" and thus improperly set Hill's base sentencing offense level at 24. Accordingly, we reverse the conviction and remand for further proceedings consistent with this opinion.

I. Background

On the evening of November 7, 1995, Hill was traveling southbound on 11th Street near Irving Street in Northwest Washington, D.C. in a car that he had recently purchased. The car was driven by a friend of Hill's; Hill was in the front passenger seat and two additional passengers were in the back. At approximately 9:20 p.m., two officers in a patrolling police car observed the car, which one of the officers later testified did not have a VIN on its temporary D.C. tags. The police activated their emergency lights to stop the car, but the car continued for one and a half blocks before stopping.

At the suppression hearing, the arresting officer testified that after the car stopped, Hill jumped out of the passenger side of the car, took a few steps, and then slipped on the wet ground. The officer saw a silver handgun fall from Hill's waist area and land in front of him. According to the officer, Hill picked up the gun and ran down the street into an alley. After a brief chase during which the police observed Hill throw the gun over a high fence, the police seized Hill. They later found the gun in a yard near the alley in which they apprehended Hill. During the police officers' chase of Hill, the car drove off with the remaining passengers. As a result, the police did not have an opportunity to verify the temporary tag number or the absence of a VIN on the tags. See Transcript of Motions Hearing and Plea Agreement at 12-24, 31-32 (Mar. 25, 1996) ("Tr.").

Harry Proctor, a records historian for the D.C. Department of Motor Vehicles, testified at Hill's trial that Department records indicated that a set of temporary tags were issued to the auto dealer that sold the car to Hill, and then to Hill when he purchased the car. Tr. at 40-42. Hill testified that the temporary tags issued in his name contained a VIN when they were issued and that the VIN was on the tags on the night of the arrest. Tr. at 72, 82-83. The tags contained a VIN at the time they were entered into evidence by Hill's counsel. See Appendix for Appellant at 15-16 (Defendant's Exhibit 2) ("App.").

Hill filed a motion to suppress the handgun on the grounds that it was the fruit of an unlawful traffic stop. The district court denied the motion after a hearing. Hill then entered a conditional guilty plea to Count One of the grand jury's indictment — which charged Hill with possession of a firearm after having been convicted of a felony in violation of 18 U.S.C. § 922(g)(1) — while reserving the right to appeal the court's adverse suppression ruling. The court thereafter ordered that a presentencing report be prepared.

The presentencing report recommended an offense level of 24 based on the fact that Hill had two prior felony convictions that qualified as a "crime of violence" under U.S.S.G. § 2k2.1 (1997). At the sentencing hearing, defense counsel argued for an offense level of 20, noting that one of the convictions — for attempted robbery under D.C. law — should not count as a "crime of violence" because it was remote in time and did not have as an element the use of physical force. The court found that Hill's conviction for attempted robbery qualified as a "crime of violence" under U.S.S.G. § 2k2.1 and determined on that basis that Hill's offense level was 24. Accordingly, the court sentenced Hill to 96 months in prison, followed by a three-year term of supervised release.

II. Analysis [9] A. The Motion to Suppress

Hill filed a motion to suppress the handgun discovered by police after the stop of Hill's car arguing that its seizure was the fruit of an unlawful stop. The district court denied the motion to suppress on the ground that the police officer that stopped Hill's car believed that he had violated the traffic laws. Hill challenges the district court's decision, claiming that the district court applied a subjective, rather than objective, reasonableness test to the actions of the officers in this case. We agree that the district court failed to make any findings regarding the objective reasonableness of the officer's decision to stop Hill's car, and we therefore reverse the district court's denial of the motion to suppress the handgun and remand for consideration of whether it was objectively reasonable for the officers that observed Hill's car to conclude that a traffic violation had occurred.

The Supreme Court has held that "[a]n automobile stop is . . . subject to the constitutional imperative that it not be `unreasonable' under the circumstances." Whren v. United States, 116 S.Ct. 1769, 1772 (1996). It is well-settled that in evaluating the reasonableness of a particular traffic stop, "it is imperative that the facts be judged against an objective standard: would the facts available to the officer at the moment of the seizure or the search `warrant a man of reasonable caution in the belief' that the action taken was appropriate?" Terry v. Ohio, 392 U.S. 1, 21-22 (1968). In other words, reasonable suspicion to stop and search a motorist depends on "the events which occurred leading up to the stop or search, and then the decision whether these historical facts, viewed from the standpoint of an objectively reasonable police officer, amount to reasonable suspicion." Ornelas v. United States, 116 S.Ct. 1657, 1661-62 (1996). The constitutional reasonableness of a traffic stop therefore does not depend on the actual motivations of the individual officers involved. See Whren, 116 S.Ct. at 1774. Instead, the relevant determination is whether the "circumstances, viewed objectively, justify" the action taken. Scott v. United States, 436 U.S. 128, 138 (1978); see Whren, 116 S.Ct. at 1774.

Here, the district court denied Hill's motion to suppress the gun because it found that the police officer that stopped the car believed that the temporary tags on the car did not contain a VIN. At the district court hearing, Hill submitted the temporary tags and bill of sale for his car, both of which contained a VIN. In addition, Hill testified that he had seen the dealer write the VIN on the temporary tags, that he had seen the dealer put the tags on his car, that the tags had not been tampered with, and that the tags were on his car the night of the stop. See Tr. at 69, 72, 82-83, 86. There was, however, testimony by a police officer indicating that he thought that the tags might have been altered. See Tr. at 25. Faced with this conflicting evidence, the court concluded that it was impossible to determine whether Hill's temporary tags actually had a VIN on them at the time Hill's car was stopped. The court therefore decided to base its suppression decision on the testimony of the parties involved in the stop, choosing to credit the officer's testimony that "he believed that the car did not have a VIN number," see Tr. at 136, over the testimony of Hill. The court explained:

. . . The evidence that I have heard indicates that a police officer believed that a vehicle was using the streets of the District of Columbia and that vehicle had temporary tags on it and that the officer did not see a VIN number.

I can't say whether the tags had a VIN number on them or not. But I know I can accept as true the officer's testimony that he believed that the car did not have a VIN number.

Id.

We agree with Hill that the district court failed to apply the correct test to the officer's decision to stop Hill's car. The above-quoted portion of the transcript indicates that the district court applied a subjective reasonableness test to the officer's decision to stop Hill's car, rather than the objective reasonableness test that is required in such situations. The court noted that it accepted the officer's testimony that "he believed that the car did not have a VIN number," but the court never explicitly stated whether or not this belief was objectively reasonable. Indeed, the record before us contains no information regarding the conditions under which the officer first observed Hill's car — e.g., how far away the police cruiser was from Hill's car at the time the officer first observed the tags, the quality of the lighting, how quickly Hill's car was moving, etc. — and whether, given those conditions, it was objectively reasonable for the officer to conclude that the tags were missing a VIN. We therefore reverse the district court's denial of Hill's motion to suppress and remand to the district court for a determination of whether it was objectively reasonable for the officer that observed Hill's car to conclude that a traffic violation had occurred. See United States v. Williams, 951 F.2d 1287, 1291 (D.C. Cir. 1991) (noting that remand to the district court is appropriate where neither the legal reasoning nor factual findings supporting the denial of a motion to suppress are apparent because it is not clear "[o]ne, that the district court asked the right legal questions in making its ruling; two, that it actually weighed the evidence bearing on the facts needed to answer them"); see also United States v. Dale, 991 F.2d 819, 840 (D.C. Cir.) (per curiam), cert. denied, 510 U.S. 1030 (1993) (noting that court had previously remanded to the district court for clarification of its legal conclusions and factual findings); United States v. Jordan, 951 F.2d 1278, 1283 (D.C. Cir. 1991) (remanding for clarification of factual finding), appeal after remand, 958 F.2d 1085 (D.C. Cir. 1992); United States v. Garrett, 720 F.2d 705, 710 (D.C. Cir. 1983), cert. denied, 465 U.S. 1037 (1984) (noting that "`where the correctness of the lower court's decision depends upon a determination of fact which only a [fact-finder] could make but which has not been made, the appellate court cannot take the place of the [factfinder]'") (citation omitted). The district court may hold a new hearing to make the appropriate factual findings and to determine whether the stop complied with the relevant legal and constitutional standards. See United States v. Hodge, 19 F.3d 51, 53 (D.C. Cir. 1994) (remanding to district court for a new evidentiary hearing on a motion to suppress).

If the district court concludes that under the circumstances it was objectively reasonable for the police to believe that the car did not have a VIN on its temporary tags, we agree with the government that the absence of the VIN did "`warrant a man of reasonable caution in the belief'" that a traffic stop was justified. Terry, 392 U.S. at 22. The District of Columbia traffic regulations require that a VIN be placed on all temporary tags. The D.C. Municipal Regulations state that "[s]pecial use identification tags shall contain . . . [a] description setting forth the vehicle's trade name, model, year as given by the manufacturer, body type, and vehicle identification number." 18 D.C. Mun. Reg. § 426.11 (1995). It is irrelevant that under the D.C. municipal regulations, the car dealer is required to "prepare a special use certificate by printing or typing all of the information required on the certificate," D.C. Mun. Reg. § 506.7 (1995). Regardless of whom the regulations are directed to, the absence of a VIN on temporary tags can provide a sufficient reason to "suspect a violation of traffic laws" and therefore to stop the car for further investigation. United States v. Mitchell, 951 F.2d 1291, 1295 (D.C. Cir. 1991), cert. denied sub. nom. Zollicoffer v. United States, 504 U.S. 924 (1992). Indeed, we have repeatedly found that "`[e]ven a relatively minor offense that would not of itself lead to an arrest can provide a basis for a stop for questioning and inspection of the driver's permit and registration.'" Id. (citations omitted).

B. Sentencing

Hill claims that the base sentencing offense level recommended in the presentencing report and adopted by the district court below is incorrect. The base sentencing offense level, Hill contends, should be set at 20, rather than at 24, because his 1976 conviction for attempted robbery was incorrectly designated as a "crime of violence." In particular, Hill argues that the offense of attempted robbery in D.C. is broad and includes non-violent offenses and therefore cannot constitute a "crime of violence" for purposes of setting Hill's base offense level under the sentencing guidelines. In response, the government argues that the substance of the indictment to which Hill pled guilty (albeit to a lesser included offense) makes clear that the offense was properly classified as a crime of violence. Contrary to the government's claim, we find that when a defendant pleads guilty to a lesser included offense of the offense charged in the indictment and the statutory definition of the lesser offense allows conviction for conduct that does not meet the definition of a "crime of violence," the indictment alone does not provide a sufficient basis for designating an offense a "crime of violence." We therefore reverse the district court's decision to set Hill's base sentencing level at 24 and remand for reconsideration of whether Hill's 1976 conviction for attempted robbery was properly classified a "crime of violence."

The sentencing guidelines provide for a base offense level of 24 if the offender has two prior felony convictions of a "crime of violence." U.S.S.G. § 2K2.1(a)(2). A "crime of violence" is defined in the sentencing guidelines as an offense, punishable by more than one year in prison, that:

(1) has as an element the use, attempted use, or threatened use of physical force against the person of another, or

(2) is burglary of a dwelling, arson, or extortion, involves the use of explosives, or otherwise involves conduct that presents a serious potential risk of physical injury to another.

U.S.S.G. § 4B1.2(a). The commentary to the guidelines further explains that the term "crime of violence" includes "the offenses of aiding and abetting, conspiring, and attempting to commit such offenses." U.S.S.G. § 4B1.2 Commentary 1.

Hill bases his challenge to his base sentencing offense level on the Supreme Court's decision in Taylor v. United States, 495 U.S. 575 (1990), and this court's decision in United States v. Mathis, 963 F.2d 399 (D.C. Cir. 1992). As this court noted in Mathis, Taylor established that "when deciding whether a prior conviction qualifies as a predicate offense, the sentencing court must look only to the statutory definition, not to the underlying facts or evidence presented." Mathis, 963 F.2d at 408 (citing Taylor, 495 U.S. at 602). The courts "`should not examine the actual conduct underlying the offense' when determining whether to include it as a predicate offense under § 924(e).'" Id. (citation omitted). The court may consider only the statutory definitions of the offenses of which the defendant has been convicted; the particular circumstances under which the predicate crime was committed are irrelevant in determining whether the conviction was for a felony that includes as an essential element the use, attempted use or threatened use or physical force. See Taylor, 495 U.S. at 600-02. Alternatively, the sentencing court can consider the charging documents and jury instructions. See id. at 602. As the Taylor Court explained:

We therefore hold that an offense constitutes `burglary' for purposes of a § 924(e) sentence enhancement if either its statutory definition substantially corresponds to `generic' burglary, or the charging paper and jury instructions actually required the jury to find all the elements of generic burglary in order to convict the defendant.

Id.

In Mathis, this court applied these principles to hold that "robbery" as defined in D.C. Code Ann. § 22-2901, includes conduct that is not a "violent felony" as defined by section 924(e). See 963 F.2d at 409. That is, because the offense of "robbery" includes a non-violent taking "`by sudden or stealthy seizure or snatching,'" the offense cannot be classified as a "violent felony" under section 924 on the basis of its statutory definition alone. Id. at 408-09. As this court explained, "`stealthy seizure' under section 22-2901 is not a `violent felony' within the meaning of § 924(e), because the proof required to satisfy the element of force in the local statute falls below that which Congress intended in enacting § 924(e)." Id. at 409. This court remanded to the district court for a determination of whether the indictment and/or jury instructions required the jury to find use or threatened use of physical force in order to convict the defendant of the offense of "robbery."

The case at hand resembles Mathis in some aspects. Hill pled guilty to an unindicted offense, "Count K," which charged simply "attempted robbery." This offense is a lesser included offense of Count Two of the indictment, which charged "robbery by force and violence and against resistance and by putting in fear." App. at 33-36. The statute to which Hill pled guilty defines attempted robbery as: "Whoever attempts to commit robbery, as defined in § 22-2901, by an overt act, shall be imprisoned for not more than 3 years or be fined no more than $500, or both." D.C. Code. § 22-2902. The statute includes attempts to commit robbery "by sudden or stealthy seizure or snatching." D.C. Code § 22-2901. Thus, as in Mathis, the defendant was convicted of an offense that includes non-violent crimes. Consequently, the statutory definition of the offense for which Hill was convicted does not meet the definition of a "crime of violence."

This case differs from Mathis, however, in two important ways. First, Hill pled guilty to the offense of attempted robbery, therefore there were no jury instructions to which the sentencing court could refer to determine whether Hill's conviction met the definition of a "crime of violence." Second, Hill pled guilty to a lesser included offense of the indicted offense, rather than to the indicted offense itself. Consequently, although the indictment of Hill does suggest that the attempted robbery of which Hill pled was not committed "by sudden or stealthy seizure or snatching," it is inappropriate for the sentencing court to rely upon this indictment alone as the basis for a determination that the offense constituted a crime of violence. The rationale for this principle is clear: The crime charged is not the crime of which the defendant was convicted. It is therefore impossible for the court to know, without more, what aspects of the indicted offense can be appropriately read into the lesser included offense to which the defendant pled guilty. Moreover, as the Taylor Court itself noted, "if a guilty plea to a lesser . . . offense was the result of a plea bargain, it would seem unfair to impose a sentence enhancement as if the defendant had pleaded guilty [to the charged conduct]." Taylor, 495 U.S. at 601-02.

This does not mean, of course, that a defendant can escape application of U.S.S.G. § 2K2.1(a)(2) by simply pleading guilty to a lesser included offense of a charged offense. Several circuits have considered what to do in the situation where a defendant pleads guilty to an offense, and there is no jury instruction to examine. They have concluded that the government may use some means other than a jury instruction to establish that a prior conviction resulted from a burglary involving force for purposes of base offense level enhancement under section 924(e). Eight circuits have held that where no jury instruction is available, the court may examine various court documents to determine whether a prior conviction resulted from a crime of violence. Such an approach, these courts have noted, is consistent with the principles established in Taylor and with the guidelines and commentary thereto. We agree. We therefore hold that in determining whether a prior conviction constitutes a predicate offense for purposes of U.S.S.G. § 2K2.1(a)(2) when the statutory description of the offense includes non-violent as well as violent crimes and when the defendant has pled guilty to a lesser included offense of a charge in the indictment, the sentencing court may not rely solely on the indictment to determine whether the offense of which the defendant was convicted was a crime of violence. Instead, the court must consult other available indices to verify that the defendant was indeed convicted of a crime of violence. These other indices may include the judgement of conviction, plea agreement or other statement by the defendant on the record, presentencing report adopted by the court, and the findings of the sentencing judge. Accordingly, we remand for a new sentencing hearing to determine whether Hill's 1976 conviction for attempted robbery was properly classified a "crime of violence."

For the foregoing reasons, we reverse the district court's denial of Hill's motion to suppress and the district court's decision to set Hill's base sentencing offense level at 24, and remand for further proceedings consistent with this opinion.

So ordered.