FILED
                                                              United States Court of Appeals
                                                                      Tenth Circuit

                                                                     March 11, 2008
                     UNITED STATES COURT OF APPEALS Elisabeth A. Shumaker
                                                                      Clerk of Court
                                 TENTH CIRCUIT
                            __________________________

 UNITED STATES OF AMERICA,

          Plaintiff-Appellee,
                                                        No. 07-1319
 v.                                             (D.Ct. No. 06-cr-00424-REB)
                                                         (D. Colo.)
 ZACHARY LANGEL,

          Defendant-Appellant.
                        ____________________________

                                ORDER AND JUDGMENT *


Before TACHA, Circuit Judge, and BARRETT and BRORBY, Senior Circuit
Judges.



      After examining the briefs and appellate record, this panel has determined

unanimously that oral argument would not materially assist in the determination

of this appeal. See Fed. R. App. P. 34(a)(2); 10th Cir. R. 34.1(G). The case is

therefore ordered submitted without oral argument.



      Appellant Zachary Langel pled guilty to one count of being a felon in


      *
         This order and judgment is not binding precedent except under the
doctrines of law of the case, res judicata and collateral estoppel. It may be cited,
however, for its persuasive value consistent with Fed. R. App. P. 32.1 and 10th
Cir. R. 32.1.
possession of a firearm in violation of 18 U.S.C. § 922(g)(1). He now appeals his

conviction, arguing the district court erred in failing to suppress a firearm

discovered in his car during a traffic stop which he contends violated his Fourth

Amendment rights. We exercise jurisdiction pursuant to 28 U.S.C. § 1291 and

affirm Mr. Langel’s conviction.



                       I. Factual and Procedural Background

      The facts of Mr. Langel’s traffic stop are outlined in the district court’s

order on his motion to suppress and supported in the record provided on appeal.

See United States v. Langel, 

(D. Colo. April 24, 2007) (slip

op.). We recount only those facts necessary for consideration of the single issue

presented by Mr. Langel on appeal.



      On September 27, 2006, at 8:24 p.m., three officers from the Aurora,

Colorado Police Department were in an unmarked vehicle patrolling east Colfax

Avenue – a major four-lane street consisting of two eastbound and two westbound

traffic lanes. 

The traffic was moderately heavy and the officers were

following a vehicle directly in front of them in the right-hand lane. 

the vehicle for about three blocks, or approximately thirty seconds, they

observed it cross approximately one foot over the dotted center line separating the

right westbound lane from the left westbound lane, where it remained for about a

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second. 

then moved further to the left, where it straddled the

center line and remained for another second before swerving abruptly back into

the right westbound lane in which it had been traveling. 

time,

another vehicle was traveling in the left westbound lane between the officers’

vehicle and the vehicle they were following, but no collision occurred. 

acts of weaving and swerving were not proceeded by a turn or hand signal

or dictated by traffic, road, or weather conditions. 

also occurred

in an area known to have a high incidence of alcohol- and drug-related driving

offenses, vehicle accidents, and pedestrian-vehicle accidents. 

initiated a traffic stop. 

As Officer David Gallegos

approached the driver’s side and Officer Michael Gaskill approached the

passenger’s side, the driver, Mr. Langel, rolled down the passenger’s side

window; at this time, Officer Gallegos could see smoke in the car and smell a

heavy odor he recognized as freshly burnt marijuana. 

stop then

became a criminal investigation based on the belief Mr. Langel may have been

driving under the influence of marijuana or that he had used and/or possessed

marijuana illegally. 1 

interacted with Mr. Langel, who had exited the

      1
        Other issues raised in Mr. Langel’s suppression motion and at the
subsequent hearing concerned the legality of his arrest, the search of his person
and the vehicle, and incriminating statements Mr. Langel made to the officers at
the scene, including his comments he swerved as he was throwing a marijuana
                                                                       (continued...)

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vehicle, Officer Gallegos could smell the distinct odor of marijuana on his person.

Gallegos continued to interact with Mr. Langel, Officer Gaskill

began a search of the vehicle, where he found a handgun under the front seat. 

verified Mr. Langel was subject to an arrest warrant and

had a prior felony conviction. 

arrest, a grand jury indicted Mr. Langel for violating 18

U.S.C. § 922(g)(1), which bans convicted felons from possessing a firearm.

Relying on our decision in United States v. Gregory, 

(10th Cir.

1996), Mr. Langel filed a motion to suppress the firearm as evidence claiming, in

part, that the officers did not have reasonable suspicion or probable cause to make

the initial traffic stop because, like the defendant in Gregory, he only

momentarily swerved into the other lane and the Colorado traffic statutes he

violated are similar to the statute violated in Gregory.



      The district court held a hearing on the motion, at which time Officer

Gallegos testified as to the circumstances surrounding the traffic stop. Langel,

, at *1. In denying Mr. Langel’s request to exclude the firearm

      1
       (...continued)
roach out of the window and that he “was done [and] ... going away for a very
long time” after Officer Gaskill found the gun in the car. 

Because
Mr. Langel has not raised these issues on appeal, we do not address them.


                                          -4-
as evidence, the district court found Officer Gallegos’s testimony to be credible

and cogent and that the officers, based on their personal observation of Mr.

Langel’s erratic driving, had reasonable suspicion as well as probable cause to

stop him for violating Colorado statutes prohibiting a lane change without

ascertaining if it can be made with reasonable safety or using an appropriate lane

change signal. 

4 (relying on C.R.S. §§ 42-4-903(1) and 42-4-

1007(1)(a)). In making this determination, the district court pointed out our

decision in Gregory was both factually and legally distinguishable because it

involved Utah law where we determined the single act of weaving to the right of

the roadway into an emergency lane on a winding road, in mountainous terrain

and windy weather, did not warrant a stop of the defendant. 

n.7; see

also 

. In contrast, the district court explained that in the

instant case, Mr. Langel wove inexplicably into the other lane and the path of

another vehicle without any adverse weather or driving conditions and in

violation of Colorado statutes which implicated more than just a weaving

violation. See Langel, 

, at *4 n.7. It then concluded the traffic

stop, which was based on observed traffic violations, was justified at its inception

and valid under the Fourth Amendment. 

. It also determined the officers,

on witnessing Mr. Langel’s erratic driving and then seeing and smelling

marijuana smoke, had probable cause to arrest him for driving under the influence

of drugs and/or possession and use of marijuana, and that the contemporaneous

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search of his vehicle, at which point the firearm was found, was incident to a

lawful arrest as an exception to the Fourth Amendment. 

.



      Following the district court’s order, Mr. Langel pled guilty to one count of

being a felon in possession of a firearm, subject to the condition he could appeal

the district court’s denial of his motion to suppress. Thereafter, the district court

sentenced him to fifty-one months imprisonment and three years supervised

release.



                                   II. Discussion

      On appeal, Mr. Langel frames the issue as follows:

      “It is quite commonplace,” this court has said, “for a driver to drift,
      momentarily, from his position within a lane,” and on occasion the
      court has declined to authorize a traffic stop solely on the basis of a
      single incident of drifting. Mr. Langel, while driving a car, drifted
      momentarily from his lane. Was the district court wrong to uphold
      his stop?

Apt. Br. at 1. In making this argument, Mr. Langel continues to rely extensively

on our decision in Gregory. In so doing, he admits the distinguishing factors of

high winds and a mountainous road are not present here but claims the holding in

Gregory should apply anyway because the Colorado statutes in violation here are

similar to the Utah statute in that case, and his lane change “could only have been




                                          -6-
three feet or so,” which is similar to the two-foot lane change in Gregory. 2



      We review a district court’s denial of a motion to suppress evidence “in the

light most favorable to the government and accept the court’s factual findings

unless clearly erroneous.” United States v. Hanrahan, 

, 966 (10th

Cir. 2007) (citation omitted), petition for cert. filed (U.S. Feb. 8, 2008) (No. 07-

9543). In considering such a motion, “[i]t is within the province of the district

court to assess the credibility of witnesses, weigh the evidence, and draw

reasonable inferences therefrom.” 

the district court’s denial of

a motion to suppress, “[w]e review de novo the ultimate determination of

reasonableness under the Fourth Amendment.” 

traffic stop is

constitutional is a two-step inquiry in which we determine if: 1) the officer’s

action is justified at its inception; and 2) the traffic stop was reasonably related in

scope to the circumstances justifying the interference in the first place. See 

Langel does not contest the second part of our inquiry, we look only

to whether the traffic stop was justified at its inception. See 

stop is


      2
          While the record indicates Mr. Langel crossed approximately one foot
over the dotted center line dividing the right westbound lane from the left
westbound lane for one second, it does not indicate the total additional feet Mr.
Langel swerved when he moved further left for another second and straddled the
center line. Nevertheless, even if we accept Mr. Langel’s premise he crossed a
total of three feet, it is insufficient for us to conclude the traffic stop was invalid,
especially when considered with the other evidence which supports the validity of
the stop.

                                          -7-
valid at its inception if the stop is based on an observed traffic violation or if the

police officer has reasonable articulable suspicion that a traffic or equipment

violation has occurred or is occurring.” United States v. Lyons, 

,

1234 (10th Cir. 2007) (quotation marks, citation, and alterations omitted).



      Applying our standard of review and the principles applicable to a traffic

stop, it is clear the officers had a reasonable articulable suspicion to stop Mr.

Langel for his patent traffic violations which they personally observed and which

occurred in conditions unlike those presented in Gregory. As the district court

pointed out, the circumstances in Gregory differed from those here because it

involved the single act of weaving into an emergency lane on a winding road in

mountainous terrain and windy weather. Here, no such conditions existed.

Nothing about the weather appears to have contributed to Mr. Langel’s erratic

operation of the vehicle and Mr. Langel did not enter into an emergency lane

unoccupied by other vehicles but swerved into another lane of traffic where the

danger of collision with another vehicle existed. His erratic driving occurred not

on a less-traveled mountainous road, but on a major four-lane thoroughfare in

Aurora, Colorado, which is part of a major metropolitan area. It also occurred on

a section of east Colfax known to have a high incidence of alcohol- and drug-

related driving offenses, vehicle accidents, and pedestrian-vehicle accidents.




                                           -8-
      Having reviewed the record on appeal, we conclude the district court’s

factual findings are not clearly erroneous and that the circumstances presented are

“sufficient to create a reasonable suspicion that [the driver] of the vehicle might

be sleepy or impaired, and could present a risk of harm to himself and others.”

See United States v. Ozbirn, 

, 1199 (10th Cir. 1999). Thus, after

viewing the district court’s denial of Mr. Langel’s motion to suppress in the light

most favorable to the government, we agree a reasonable articulable suspicion

existed for the traffic stop, and therefore the stop was reasonable under the Fourth

Amendment. For these reasons, Mr. Langel’s argument he drifted only one foot

more than the driver in Gregory, or that the Colorado traffic statutes he violated

are similar to the Utah statute at issue in Gregory, are insufficient to establish a

Fourth Amendment violation when considered together with the other

circumstances supporting his traffic stop.



      Our determination is bolstered by a plethora of cases distinguishing

Gregory from situations similar to the one presented here, where the road

conditions surrounding the traffic stop were unlike those in Gregory. See, e.g.,

United States v. Valenzuela, 

, 887, 889 (10th Cir.) (affirming traffic

stop where no outside factors contributed to vehicle drifting into another lane for

three to four feet and several seconds before returning to its lane), cert. denied,

(2007); United States v. Alvarado, 

, 1306-07, 1309

                                          -9-
(10th Cir. 2005) (affirming traffic stop where no adverse road or weather

conditions caused vehicle to drift out of the right-hand lane and over the fog line

for a few seconds); United States v. Cline, 

, 1285-87 (10th Cir.

2003) (upholding stop of motorist who swerved where nothing about the road

conditions would have caused such an action); United States v. Zabalza, 

, 1257-58 (10th Cir. 2003) (upholding traffic stop on interstate based on

officer’s observation vehicle crossed center line twice in weather which would not

make it impracticable to maintain a single lane of travel); 

, 1198-99 (affirming traffic stop based on defendant’s motor home drifting

onto the shoulder twice in less than a quarter mile under optimal weather

conditions); United States v. Dunn, 

, 

, at **1-2 (10th

Cir. Jan. 12, 1998) (unpublished op.) (upholding traffic stop where car swerved

out of its lane on fairly straight, non-mountainous interstate with slight grade and

winds less than twenty miles per hour in a car easier to control than the U-Haul

truck driven in Gregory). 3 In distinguishing Gregory from other cases involving a

vehicle drifting or swerving outside its traffic lane, we have explained Gregory

does not establish an absolute standard or bright-line rule on what constitutes a

valid traffic stop but that, like here, all of the surrounding facts and circumstances


      3
         We rely on this unpublished case given it has persuasive value and
provides reasoned guidance on a like issue. See 10th Cir. R. 32.1(A); United
States v. Samuels, 

, 1194 n.9 (10th Cir.), cert. denied, 

(2007).

                                         -10-
must be considered to determine if the stop was valid. See 

; 

; 

; 

.



                                 III. Conclusion

      For the foregoing reasons, we AFFIRM Mr. Langel’s conviction.



                                     Entered by the Court:


                                     WADE BRORBY
                                     United States Circuit Judge




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