Court Opinion

ID: 9402493
Source: CourtListenerOpinion
Date Created: 2023-06-15 21:00:50.556791+00
Date Added: 2024-06-11T17:20:00.428488
License: Public Domain

United States Court of Appeals
                     For the First Circuit

No. 21-1758

                    UNITED STATES OF AMERICA,

                            Appellee,

                               v.

                          DAMON FAGAN,

                      Defendant, Appellant.

          APPEAL FROM THE UNITED STATES DISTRICT COURT
                    FOR THE DISTRICT OF MAINE

           [Hon. D. Brock Hornby, U.S. District Judge]

                             Before

                 Kayatta, Howard, and Thompson,
                         Circuit Judges.

     Noreen McCarthy for appellant.
     Benjamin M. Block, Assistant United States Attorney, with
whom Darcie N. McElwee, United States Attorney, was on brief, for
appellee.
     Zachary L. Heiden, Carol J. Garvan, Gilles R. Bissonnette,
Matthew Warner, and Preti Flaherty LLP, on brief for amici curiae
American Civil Liberties Union of Maine Foundation, American Civil
Liberties Union of New Hampshire Foundation, and American Civil
Liberties Union of Massachusetts, Inc.

                          June 15, 2023
            KAYATTA, Circuit Judge.     A traffic stop on the Maine

Turnpike for unsafe operation of a vehicle led to the discovery of

evidence showing that Damon Fagan was carrying heroin with the

intent to distribute it.    Seeking to suppress that evidence, Fagan

argued in the district court that the officer who pulled him over

lacked a sufficient basis for suspecting that Fagan had committed

a motor vehicle violation, and that his detention and interrogation

following the traffic stop otherwise violated his constitutional

rights.     After the district court denied his motion to suppress,

Fagan pled guilty while reserving his right to appeal the refusal

to suppress the evidence found in the traffic stop.         For the

following reasons, we affirm the denial of Fagan's motion to

suppress.

                                  I.

            On January 6, 2019, shortly before 11:00 p.m., Fagan and

a passenger were driving north on the Maine Turnpike, followed by

Maine State Trooper John Darcy.   The record supports an inference,

and the district court assumed, that the reason Darcy chose to

follow Fagan was because Fagan, a Black man, fit Darcy's profile

of what he calls "thugs" whom he suspects of drug dealing.    After

running Fagan's tag numbers and learning that the vehicle was a

registered rental car from a location in Presque Isle (much further

north in Maine than where Darcy and Fagan were driving at that

time), Darcy continued to follow Fagan. A few minutes later, while

                                - 2 -
Fagan was traveling in the right lane, Darcy saw Fagan enter the

middle lane to pass a tractor-trailer and then move back into the

right lane in front of the tractor-trailer.              Darcy then pulled

Fagan over.       This stop resulted in over an hour and a half of

questioning, and concluded with Fagan relinquishing 37 grams of

heroin that he was carrying on his person.               When later charged

with possession with intent to distribute, Fagan moved to suppress

the evidence garnered from the traffic stop, arguing that the stop

was illegal and that his Fourth and Fifth Amendment rights were

violated by the subsequent police questioning.

            The contest at the suppression hearing initially focused

on whether Darcy had a sufficient basis to pull Fagan over.            Fagan

did not testify, so all the evidence came from Darcy, a video taken

by a dashcam in the police cruiser, and Darcy's body camera that

activated after the cars stopped.

            The    district   court    found   Darcy's    testimony   to   be

credible.    That testimony was as follows:

            Fagan's car was between a tractor-trailer and Darcy's

car in the right lane as Fagan's vehicle closed on the tractor-

trailer.    Fagan's car then moved left into the adjoining lane to

accelerate past the tractor-trailer.            "[J]ust as" Fagan's car

passed the tractor-trailer, Fagan's car "cut off" the tractor-

trailer by moving back into the right lane without signaling before

crossing the lane line "very close to the front of the tractor-

                                      - 3 -
trailer, not leaving much space for any reaction time," and not

leaving "a safe distance in between as it cut in front of the

vehicle."    Darcy further described the lane change by noting that

Fagan had "turned into that lane close enough in front of that

tractor trailer that if [he] had to stop short[] [he] would have

caused a collision, most likely."            Darcy "acknowledge[d]" that

"the truck never put its brake lights on" and "never swerved."               He

also stated he did not know "[w]hether the [trucker] had to

downshift to avoid [Fagan]."

            The video, taken from a less advantageous angle on the

passenger side of Darcy's vehicle, prompted the district court to

agree that the move back to the right lane was "abrupt."                Having

viewed the video,1 we do not find this characterization clearly

erroneous.    The video also confirms Darcy's testimony that Fagan

commenced the lane change without first signaling.              On the other

hand, it does not make clear the distance between Fagan's vehicle

and the tractor-trailer at the time of the lane change.             The video

does not show the front of the tractor-trailer, which Darcy

acknowledged in his testimony.           And it also confirms that the

tractor-trailer did not brake.           Ultimately, the district court

determined that the video was not conclusive either way on the

     1   The video is accessible at https://www.ca1.uscourts.gov/citationsmedia.

                                    - 4 -
safety of the lane change, and we do not find this to be clearly

erroneous either.

           Darcy himself was not able to put a specific number on

the distance between Fagan's car and the tractor-trailer at the

time of the lane change other than to say that the vehicles were

separated by "very little distance" and the change occurred "just

as" Fagan's car passed the tractor-trailer.      Nor was he able to

estimate Fagan's precise speed when Fagan passed the tractor-

trailer.   Darcy did agree that the video shows that approximately

one second after the pass was completed, Fagan was "three or four

car lengths" in front of the tractor-trailer.      Fagan agrees that

the lane change took roughly four to five seconds from when Fagan

began to move right until he completed the change (approximately

the same amount of time as Fagan's initial lane change into the

middle lane).

           After the two cars pulled over, Darcy approached Fagan's

vehicle.    At the time, Darcy believed -- incorrectly -- that

changing lanes without first signaling was in and of itself a

violation of Maine's traffic laws.      He accused Fagan of both not

signaling and cutting off the tractor-trailer.       ("You just cut

that truck off.   You didn't put on your turn signal until you were

already in the lane.")   When Fagan was unable to produce a license,

Darcy had Fagan exit the vehicle and then patted him down, finding

a knife.   In response to questioning by Darcy, Fagan stated that

                                - 5 -
he was on bail and his driver's license was suspended.           He said

that he and his passenger were coming from shopping in Kittery,

Maine.    Separately questioned, the passenger said they were coming

from Connecticut where they dropped off a niece and Fagan visited

a friend.

            Darcy next learned via a computer check that Fagan's

license was indeed suspended, that he had prior drug trafficking

involvement, and that he was on bail.         Darcy also learned that

Fagan's bail conditions imposed a 7:00 p.m. curfew, prohibited

Fagan from leaving Maine, and subjected him to searches of his

person "at any time without articulable suspicion or probable

cause."    Subsequent questioning led to the production of 37 grams

of heroin, which Fagan retrieved from between his buttocks after

dog sniffs of both the vehicle and its passengers, multiple rounds

of questioning, and a body search by Darcy.

            Surveying the foregoing, the district court concluded

that "a reasonable officer" in Darcy's position "could believe

that there was probable cause for this traffic stop."           The court

therefore held that the stop did not violate the Fourth Amendment.

The   district   court   also   rejected   Fagan's   argument   that   the

discovery of the heroin was the product of improper detention and

questioning.

            Over a year after the district court denied Fagan's

suppression motion, Fagan's lawyers discovered new evidence that

                                  - 6 -
had not been available at the time of the initial hearing.               The

new evidence included a taped conversation between Darcy and

another officer recorded after Fagan's arrest, at the time of an

arrest of another person made by Darcy, as follows:

           Darcy: Like if I see a white thug, I'm going
           to be interested, just like a Black thug, or
           a fuckin' Chinese thug. Like, I'm interested
           in thugs.     We don't, that's not racial
           profiling. Like, some Black guy goes by, and
           he's just some normal dude from Portland, I
           don't give a fuck, you know what I mean? Like
           whatever. This guy kind of looks like a thug,
           to be honest with you.

           Other Trooper:       You see the guy driving?

           Darcy:   Yeah.   He's wearing a wife-beater,
           he's got dreads, he looks like a thug, he may
           not be. And I'm not profiling him racially,
           because I don't care that he's white, Black.
           White kid, neck tats all over him, fucking
           sideways hat, thug, you know what I mean? So
           like I get . . . I hate when people try to
           make it seem like that's what it is. I care
           about where people are from, and the way they
           seem, do you know what I mean? Like, do they
           seem like they could be involved in the drug
           game, or gangs, or something, you know what I
           mean? I don't give a fuck if somebody's Black,
           white, like . . . And I like saying this,
           Nicole has a fucking niece who is half Black,
           I'll tell someone like, my niece is half-
           Black, don't play that racial shit with me.

           The district court noted, and the government agrees on

appeal, that using racial profiling to selectively enforce the law

violates      the     Fourteenth   Amendment       to   the   United   States

Constitution.       Both parties also agreed below -- and agree on

appeal   --    that    the   existence   of    a   racially   discriminatory

                                    - 7 -
motivation for a stop and search provides no basis for suppressing

evidence gathered in the search if there was otherwise sufficient

cause for the stop and search.           See Whren v. United States, 517

U.S. 806, 813 (1996).

           The    district      court        nevertheless     recognized      the

possibility   that   evidence    of     an    officer's     racial   bias   could

undercut the officer's credibility in reporting on the actions

taken by the target of his selective hunt.                  So it agreed to a

limited reopening of the suppression hearing to receive the new

evidence and to consider anew whether Darcy's description of

Fagan's driving was credible.           The court concluded that Darcy's

description remained credible.          In short, even though it assumed

Darcy had been motivated to follow Fagan and to find a reason to

stop him because Darcy believed that persons fitting Fagan's

profile were "thugs," the court reaffirmed its finding that Darcy's

description of Fagan's driving was credible. And the court further

reaffirmed that that even though it "[could not] determine actual

separation distance between the two vehicles," it did "not find

that Darcy lied in giving the unsafe lane change explanation" and

once again denied the motion to suppress.

           Fagan subsequently entered a conditional plea of guilty

on   August 18,   2021,   and   was     sentenced    to   twenty-one    months'

imprisonment and an additional three years of supervised release.

                                      - 8 -
The terms of his plea agreement reserved his right to appeal the

decision not to suppress the heroin found on him.

                                      II.

                                      A.

          We consider first the stop of the car driven by Fagan,

starting with the applicable law.           When Darcy pulled Fagan over,

he effected a "seizure" of Fagan within the meaning of the Fourth

Amendment.     Brendlin v. California, 551 U.S. 249, 255–59 (2007).

Both parties agree that to justify such a seizure for a traffic

violation the officer must have a "reasonable suspicion" that the

person stopped is breaking the law.          Heien v. North Carolina, 574

U.S. 54, 60 (2014).    A mere hunch is not enough; on the other hand,

the level of proof required is "'obviously less' than is necessary

for probable cause."       Navarette v. California, 572 U.S. 393, 397

(2014) (quoting United States v. Sokolow, 490 U.S. 1, 7 (1989));

see also United States v. Romain, 393 F.3d 63, 71 (1st Cir. 2004)

("[T]he showing required to meet this standard is considerably

less demanding than that required to make out probable cause.").

          In     gauging    whether    the    circumstances   generate   a

reasonable suspicion, we apply "an objective standard, rather than

assessing the subjective intent of an individual officer."         United

States v. Tiru-Plaza, 766 F.3d 111, 116 (1st Cir. 2014).           We are

restricted to asking whether a hypothetical reasonable officer

                                  - 9 -
considering what Darcy observed2 would reasonably suspect that

Fagan had operated his vehicle unsafely in violation of Maine's

traffic laws.      See id.

           In     this   case,     the    relevant       traffic    laws    are    those

prohibiting     unsafe    lane     changes.        See     Me.     Rev.    Stat.    Ann.

tit. 29-A, § 2070.1 ("Passing on left.                   An operator of a vehicle

passing another vehicle proceeding in the same direction must pass

to the left at a safe distance and may not return to the right

until    safely     clear     of     the        passed     vehicle.");       § 2071.1

("Prohibition.      An operator may not turn a vehicle or move right

or left on a public way unless the movement can be made with

reasonable safety.").        In Maine, failing to signal before changing

lanes is not per se an infraction.                See Pooler v. Clifford, 639

A.2d 1061, 1062 (Me. 1994).          Whether and when a signal is made can

bear, however, on whether the lane change is safe.                    See id.

                                           B.

           Given the foregoing controlling law, Fagan's Fourth

Amendment challenge to his conviction turns on whether the district

court committed reversible error in finding that the circumstances

gave rise to a reasonable suspicion that Fagan changed lanes in an

unsafe manner. In addressing that question, we employ a bifurcated

     2  The government makes no claim that any other officer knew
or observed anything that should be included in our analysis of
the initial stop.

                                         - 10 -
standard of review.      First, as to any issues of fact (here, what

happened), we must accept the district court's factual findings

absent clear error.      Tiru-Plaza, 766 F.3d at 114-15.     In so doing,

we need not accept illogical findings, Mitchell v. United States,

141 F.3d 8, 17 (1st Cir. 1998), or mere guesswork, McGuire v.

Reilly, 260 F.3d 36, 45–46 (1st Cir. 2001).         But we must consider

the facts in the light most favorable to the district court's

ruling, United States v. Fermin, 771 F.3d 71, 76 (1st Cir. 2014).

Importantly for purposes of this appeal, our review must be

"'especially deferential' to the district court's evaluation of

witnesses' credibility."       United States v. Sierra-Ayala, 39 F.4th

1, 13 (1st Cir. 2022) (quoting United States v. Jones, 187 F.3d

210, 214 (1st Cir. 1999)).         Thus, "absent objective evidence that

contradicts a witness's story or a situation where the story itself

is so internally inconsistent or implausible that no reasonable

factfinder would credit it, 'the ball game is virtually over' once

a district court determines that a key witness is credible."             Id.

(quoting United States v. Guzmán-Batista, 783 F.3d 930, 937 (1st

Cir. 2015)).

           Second, as to issues of law (most notably, whether the

facts viewed in the light most favorable to the district court's

decision   gave   rise    to   a   reasonable   suspicion   of   a   traffic

violation), we proceed afresh, albeit in drawing these legal

conclusions we must "give appropriate weight to the inferences

                                    - 11 -
drawn by the district court and on-scene officers, recognizing

that they possess the advantage of immediacy and familiarity with

the witnesses and events."             Tiru-Plaza, 766 F.3d at 115; see

Ornelas v. United States, 517 U.S. 690, 699 (1996) (we must "give

due weight from inferences drawn from [the] facts by resident

judges and local law enforcement officers.")                Our charge is to ask

what a hypothetical reasonable officer would have thought of the

situation, not to accept automatically Darcy's ultimate conclusion

that Fagan drove unsafely.         But once the district court accepts an

officer's testimony as credible -- which the district court did

here   --   absent    evidence   to    the      contrary,   we    must   treat   the

officer's    report    of   what      he    saw   as   evidence     of   what    the

hypothetical reasonable officer would have seen. See, e.g., United

States v. Dion, 859 F.3d 114, 127 & n.10 (1st Cir. 2017) (affirming

district     court's    finding       that      officer     was   credible,      and

considering defendant's nervousness, which officer had testified

to, in evaluating legality of a stop); United States v. Gilliard,

847 F.2d 21, 24–25 (1st Cir. 1988) (affirming district court's

credibility finding and taking officer observations into account

to determine that stop was justified).

                                           C.

            We return now to Darcy's description of what he saw.

            Darcy testified that without first signaling, Fagan "cut

in" to the right lane in front of the tractor-trailer, "leaving

                                      - 12 -
very little distance between the two," such that it would likely

have caused a crash had Fagan needed to stop quickly.    Darcy also

explained that there was "not . . . a lot of traffic, [and] there

was no need for the vehicle to cut over immediately."   Fagan points

out that Darcy could not state the actual distance in feet or yards

between the rear of Fagan's car and the front of the tractor-

trailer.    But it did appear to Darcy -- then a state trooper whose

job entailed surveilling turnpike traffic -- to be "very close."

See Tiru-Plaza, 766 F.3d at 116 (granting "respect to the ability

of trained and experienced police officers to draw from the

attendant circumstances inferences that would 'elude an untrained

person.'" (quoting United States v. Cortez, 449 U.S. 411, 418

(1981))).    Darcy also agreed that Fagan's car was approximately

"three or four car lengths" in front of the tractor-trailer

"roughly one second" after Fagan completed the lane change. Fagan,

in turn, was moving faster than the tractor-trailer shortly after

he completed his pass (as evidenced by the video, which shows Fagan

moving away and quickly leaving enough space for Darcy's cruiser

to pass in front of the tractor-trailer).   And as Fagan's brief on

appeal states, the lane change from start to finish took roughly

four to five seconds. Taking all these facts together, and viewing

them (as we must) in the light most favorable to the conclusion

reached by the district court, see Fermin, 771 F.3d at 76, we agree

with the district court that a reasonable officer could have

                               - 13 -
suspected    that    Fagan   executed      an   unsafe   lane   change.   In

particular, a reasonable officer could have suspected that Fagan

was quite a bit closer than three to four car lengths when he began

moving abruptly into the tractor-trailer's lane without first

signaling.

            Simple   math    shows   why   such   a   qualitative   suspicion

generated by these facts is reasonable.            Start with the fact that

Fagan's car was three to four car lengths in front of the truck

about one second after Fagan had completed the pass.                  As the

dissent fairly estimates, that is 45–60 feet, which we will assume

is a safe distance.3     Key then is how much closer the two vehicles

were roughly five to six seconds earlier when the lane change

commenced (since, as Fagan's brief states, the change itself took

four to five seconds).       The answer depends on how much faster Fagan

was traveling than was the tractor-trailer.               As Fagan and the

dissent note, the record does not contain direct evidence of either

driver's speed.      But the video visibly shows Fagan driving faster

as he passed the tractor-trailer (how else to pass it).             The video

also shows that when Darcy got to the front of the tractor-trailer,

     3   This assumption is generous to Fagan given that the
National Highway Traffic Safety Administration warns that it takes
1.5 seconds to react and hit the brakes and a typical vehicle going
55 miles per hour travels 121 feet in 1.5 seconds. See U.S. Dep't
of Transp. Nat'l Highway Traffic Safety Admin., Safety 1n Num3ers
(August 2015), https://one.nhtsa.gov/nhtsa/Safety1nNum3ers/august2015/S1N_A
ug15_Speeding_1.html (last visited June 9, 2023).

                                     - 14 -
Fagan was by then well more than three to four car lengths away

(i.e., he was going quite a bit faster than the truck), and Darcy

agreed at the suppression hearing that Fagan's car was "moving

further away from the tractor trailer" after the pass.             That is to

say, having been moving visibly faster than the tractor-trailer in

order to pass it, Fagan's car gave no indication that it did not

maintain   that    greater     speed    throughout      the     lane     change.

Conservatively    assuming     just    a    five   mile   per     hour    speed

differential, and conservatively assuming that the elapsed time

was five seconds, not six, the math is as follows:

       5 𝑚𝑖𝑙𝑒𝑠 5280 𝑓𝑒𝑒𝑡      ℎ𝑜𝑢𝑟
              ×          ×              × 5 𝑠𝑒𝑐𝑜𝑛𝑑𝑠 = 36.67 𝑓𝑒𝑒𝑡 𝑐𝑙𝑜𝑠𝑒𝑟
        ℎ𝑜𝑢𝑟     𝑚𝑖𝑙𝑒      3600 𝑠𝑒𝑐𝑜𝑛𝑑𝑠
           In short, given the facts drawn from Darcy's testimony,

along with the video footage, one could estimate that at the time

Fagan began to abruptly move back into the slow lane without first

signaling, the distance between the vehicles may have been very

tight; i.e., it could have been as little as between 9 and 24 feet

(45 to 60 feet minus 36 feet).         The dissent does not dispute that

the methodology represented by this equation properly converts

Fagan's position when Darcy got to the front of the tractor-trailer

to Fagan's position when he commenced the lane change.                 Instead,

the dissent challenges only the values assigned to two variables

-- the speed differential between Fagan's vehicle and the tractor-

                                   - 15 -
trailer, and the amount of time that it took to complete the lane

change.

          As to the latter, the dissent contends that we should

use one second rather than five.         But one second was the time

between the completion of the lane change and the time at which

Fagan was viewed three to four car lengths in front.         The relevant

time is the four to five seconds that Fagan admits passed from the

beginning to end of his move into the slow lane in front of the

truck, plus the additional second that elapsed before Fagan was

three to four car lengths away from the truck.

          That leaves only the speed differential.          If the dissent

were correct that there was no difference in speeds during and

following the pass, then the pass must have begun with a three to

four vehicle gap.   So, too, though, if the speed differential were

anything like five miles per hour, then the belatedly signaled

lane change began with only a 9 to 24 foot gap. And even the

dissent does not argue that Darcy could not reasonably suspect

such a lane change to be unsafe.

          The   video   bears   twice    on   the   issue   of   the   speed

differential.   First, although it does not reveal the vehicles'

precise speeds, it shows that Fagan's car was clearly going visibly

faster than the tractor-trailer just before it began the lane

change.   Second, it provides no support for the counter-intuitive

                                - 16 -
possibility that Fagan did not maintain or even increase that

greater speed throughout the lane change.

           Our dissenting colleague posits that maybe the tractor-

trailer sped up when its driver saw Fagan in its lane.     But if

that had happened, Fagan would still have been three to four car

lengths ahead when Darcy got beside the tractor-trailer.   And the

video plainly shows that Fagan by that point was even further in

front of the tractor-trailer; i.e., he was still going faster than

the tractor-trailer.

           None of this is to suggest that Darcy did the math.

Rather, it is to show that the facts in the record -- such as they

are -- reasonably accommodate his qualitative assessment as an

experienced state trooper of the abrupt lane change as being "too

close."    And given all of this, we cannot say that the district

court erred in concluding that a reasonable officer in Darcy's

position could have reasonably suspected he had witnessed unsafe

driving.

           Nor is this conclusion belied by Darcy's agreement that

the stop lights on the tractor-trailer did not flash, nor did that

vehicle otherwise appear to alter course.   That strongly suggests

that the driver of the tractor-trailer felt no danger.     But the

absence of a discernable reaction by the tractor-trailer driver

does not necessarily mean that a person in Darcy's position could

not reasonably assess the safety of Fagan's move differently.   The

                              - 17 -
"reasonable suspicion" required to justify a traffic stop does not

require certainty or even correctness, and reasonable people can

disagree on what is objectively safe. See United States v. Arvizu,

534 U.S. 266, 277 (2002). That Darcy and the driver of the tractor-

trailer may have disagreed as to whether Fagan cut off the tractor-

trailer does not necessarily mean that either Darcy or the driver

of the tractor-trailer was unreasonable.

                                  D.

          Recognizing the importance of Darcy's credibility in the

foregoing analysis, Fagan and his supporting amici train their

focus on Darcy's state of mind.    In so doing, Fagan stresses that

he is "not arguing for suppression because of Darcy's reprehensible

racial profiling."   Rather, Fagan makes the more subtle argument

that Darcy's bias and his eagerness for a drug bust should have

precluded the district court from giving credence to Darcy's

version of what transpired. And were Darcy's testimony discounted,

there would remain no sufficient basis from which one could

generate reasonable suspicion of a traffic violation.

          We agree with Fagan's contention that evidence of an

officer's racial bias in deciding which drivers to surveil and

stop can undercut the credibility of the officer's description of

the facts that supposedly justified the stop.    The district court

did not reject this contention.    To the contrary, it reopened the

suppression hearing precisely to accept the new evidence tendered

                              - 18 -
by Fagan and to consider again Darcy's credibility.               In the

district court's words, "[t]he question before [the court] on the

reopened motion [was] whether Darcy lied in saying that Fagan

executed an unsafe return to the right-hand lane."         In turn, the

district court made clear that in answering that question, the

court considered all of the new evidence, and assumed that Darcy

"singled out Fagan's vehicle for improper reasons as it went

through the York toll plaza."    The district court also made clear

its plainly correct view that "racial profiling is reprehensible."

          Unfortunately   for   Fagan,   after   hearing   all   the   new

evidence and extended questioning of Darcy, the district court

found that "irrespective of Darcy's personal motivation, I do not

find that Darcy lied in giving the unsafe lane change explanation."

In explaining this conclusion, the district court focused on two

facts upon which the parties agreed: (1) at the time of the arrest,

Darcy wrongly thought that failing to signal before initiating a

lane change was per se a violation of the motor vehicle laws; and

(2) the video confirmed that Fagan initiated his lane change in

front of the tractor-trailer without first signaling.        Therefore,

reasoned the district court, Darcy had no reason to fabricate his

                                - 19 -
contemporaneous          description   recorded     on    his   dashcam    of   the

closeness of the lane change in order to justify the stop.4

                So Fagan is left to argue that we should reject as clear

error the district court's express finding that Darcy was credible.

Fagan points out that after his motion was denied, another judge

found Darcy not to be "a very credible witness."                   But of course

the judge in this earlier case could not have known that.                   And the

fact that a witness's credibility is found lacking in one case

does not mean that his testimony must be retroactively deemed not

credible as a matter of law in other cases.               Nor does it constitute

the kind of "objective evidence that contradicts [Darcy's] story"

to which he testified in this particular case that we would need

to overturn a credibility finding on appeal.                 Guzmán-Batista, 783

F.3d       at   937–38     (determining   that    where    defendant      presented

"compelling evidence" of his version of events, but that evidence

"create[d] two possible alternative version of the events," the

district court's choice between those alternatives could not be

deemed clearly erroneous).

                Finally,     the   dissent      implicitly      assails    Darcy's

credibility by questioning Darcy's characterization of the lane

change as cutting off the tractor-trailer at so close a distance

       4Darcy stated when he first spoke to Fagan after pulling
him over: "You just cut that truck off. You didn't put on your
turn signal until you were already in the lane."

                                       - 20 -
as to create an "almost-crash situation."        The dissent then

suggests that Darcy's characterization exaggerates how close the

vehicles came, and thus undercuts Darcy's testimony.       But the

district court -- which viewed the video and observed Darcy testify

-- found Darcy credible on the issue of whether he had seen Fagan

make an unsafe lane change.    Ultimately, not even the dissent can

argue that we are not effectively bound by the district court's

opinion that Darcy was credible.

                           *       *    *

          To summarize, three rules of law that we must apply drive

our holding: (1) a stop for a mere traffic violation, even when

supported only by a reasonable suspicion that such a violation

occurred, does not violate the Fourth Amendment, Heien, 574 U.S.

at 60; (2) racial profiling, while a violation of the Fourteenth

Amendment, does not trigger the exclusionary rule as it might were

it a Fourth Amendment violation, Whren, 517 U.S. at 813, 819; and

(3) district courts must be given broad leeway in determining the

credibility of witnesses who testify before them, Sierra-Ayala, 39

F.4th at 13.    Given these rules, we must affirm the district

court's holding that Darcy did not violate the Fourth Amendment in

pulling over Fagan's vehicle for a traffic violation.

                                III.

          We turn next to Fagan's alternative Fourth and Fifth

Amendment arguments for barring the government from using as

                               - 21 -
evidence the heroin recovered during the stop.                      Fagan challenges

the length of his detention at the roadside and the continued

questioning and searches that led eventually to his retrieval of

the drugs from between his buttocks.                   He claims that his prolonged

detention and the aggressive and repeated questioning (both before

and    after    Miranda       warnings     were     given)      violated   his   Fourth

Amendment right to be free of unreasonable seizures and Fifth

Amendment       right    not    to    be    coerced      into    making    statements,

respectively.

               We need not decide whether officers detained Fagan too

long   or   coerced      the    production        of    the   drugs.       Rather,    the

controlling law is clear that evidence found unlawfully is not

excluded if it would have inevitably been discovered anyhow through

lawful means.      United States v. Almeida, 434 F.3d 25, 28 (1st Cir.

2006).      We ask three questions when evaluating an inevitable

discovery argument:            "[F]irst, whether the legal means by which

the evidence would have been discovered was truly independent;

second, whether the use of the legal means would have inevitably

led to the discovery of the evidence; and third, whether applying

the inevitable discovery rule would either provide an incentive

for    police    misconduct      or    significantly          weaken   constitutional

protections."           Id.     An    arrest   is      "truly    independent"    of    an

interrogation if "(1) the police, in fact, would have arrested the

defendant, even without first having discovered the challenged

                                           - 22 -
evidence, and (2) in the absence of the challenged evidence, the

officers nevertheless had probable cause to make the arrest without

the challenged evidence."        Id.   The government has the burden to

show the exception applies.

           The district court made findings that directly support

its conclusion that discovery of the drugs was inevitable.           First,

the   officers   had   ample    grounds   --   lawfully   obtained   during

"ordinary inquiries incident to [the traffic] stop" -- to arrest

Fagan.    Rodriguez v. United States, 575 U.S. 348, 355 (2015)

(quoting Illinois v. Caballes, 543 U.S. 405, 408 (2005)).                In

brief, after stopping Fagan and asking for his driver's license,

and procuring a quick criminal history search,5 Darcy learned that

Fagan had prior involvement with illegal drugs, that he was out on

bail, that he was violating the conditions of his release on bail

by being out after 7 p.m. and by likely having left Maine, and

that as a condition of his release he had agreed to be subject to

search without cause.          Second, the officers would have indeed

arrested Fagan -- as Darcy told him -- had he not produced any

drugs, and the standard search at the jail would have discovered

the drugs. Third, since the officers knew that they could lawfully

arrest Fagan, and that he had consented to searches as a condition

of bail, the potential for incentivizing unlawful detentions in

      5 See Rodriguez, 575 U.S. at 355 (checking for outstanding
warrants is an ordinary inquiry pursuant to a traffic stop).

                                   - 23 -
other cases was mitigated.   Based on the foregoing, the district

court concluded that, once Darcy learned that Fagan had been

involved with illegal drugs, was driving with a suspended license,

and was violating his bail conditions, the discovery of the drugs

would have been inevitable even had the officers conducted no

further search or questioning at the scene.   In so concluding, the

court committed no clear error.

                                  IV.

          Finally, we turn to Fagan's argument that the district

court erred in denying his motion for discovery regarding other

stops Darcy had made.   Fagan argues that he could have impeached

Darcy's credibility by showing that he stopped minority drivers at

a statistically higher rate if the district court had allowed this

discovery.

          On its face, the proposed discovery seems aimed at

proving something that the district court already presumed to be

true: that Darcy's singling out of Fagan was racially motivated.

In any event, we agree with the government that this challenge is

waived, because Fagan pled guilty and did not identify this

discovery order as one he reserved the right to appeal.        The

conditional plea agreement only identifies the rulings on the

motion to suppress as appealable, with no reference to the ruling

on Fagan's discovery motion.    A separate hearing was held and a

separate order issued on Fagan's discovery motion, and this order

                               - 24 -
was not identified in the conditional plea.    Any challenge to an

order not specified in the conditional guilty plea is waived by

the plea.    Federal Rule of Criminal Procedure 11(a)(2) allows a

defendant to enter a conditional guilty plea, "reserving in writing

the right, on appeal from the judgment, to review of the adverse

determination of any specified pretrial motion" (emphasis added).

See United States v. Ramos, 961 F.2d 1003, 1005–06 (1st Cir. 1992),

overruled on other grounds by United States v. Caron, 77 F.3d 1

(1st Cir. 1996).     Because Fagan's motion was not specified, his

challenge is waived.

                                 V.

            For the foregoing reasons, the judgment of the district

court is affirmed.

                   - Dissenting Opinion Follows -

                               - 25 -
          THOMPSON,   Circuit   Judge,   dissenting.    The   majority

concludes that objective facts and rational inferences point to a

reasonable suspicion that Fagan made an unsafe lane change —

something the government had the burden of proving.       See, e.g.,

United States v. Monteiro, 447 F.3d 39, 43 (1st Cir. 2006).        But

I could not disagree more.      What follows is my best effort to

explain why.

                                  I

          Drug cases often follow a familiar pattern.           Police

officers stop a car for a traffic offense, even a minor one —

driving is so heavily regulated that officers have nearly endless

chances to stop anyone they want:     experience shows "that no local

police force can strictly enforce the traffic laws, or it would

[pull over] half the driving population on any given morning."

See Robert Jackson, The Federal Prosecutor, Address Delivered at

the Second Annual Conference of United States Attorneys (Apr. 1,

1940), quoted in Morrison v. Olson, 487 U.S. 654, 727-28 (1988)

(Scalia, J., dissenting); see also United States v. Magallon-

Lopez, 817 F.3d 671, 676 (9th Cir. 2016) (Berzon, J., concurring)

(mentioning Whren v. United States, 517 U.S. 806, 810 (1996)).

Citing some exception to the rule against warrantless searches,

officers then find drugs in the car or on the driver.         Which in

turn leads to federal drug charges.        And if a judge does not

suppress the drugs — because, say, the judge finds the specific

                                - 26 -
facts known to the officers gave rise to an objectively reasonable

suspicion of illegal activity — the driver-turned-defendant enters

a   conditional   guilty   plea    that   reserves   the   stop   issue   for

appellate review.

           Our case — involving Darcy's tailing Fagan's car for

miles (after it drove through the toll area without incident)

solely because of Fagan's race (as no one really disputes) —

presents   a   troubling   twist    on    this   general   storyline.     See

generally Atwater v. City of Lago Vista, 532 U.S. 318, 372 (2001)

(O'Connor, J., dissenting) (stating that, "as the recent debate

over racial profiling demonstrates all too clearly, a relatively

minor traffic infraction may often serve as an excuse for stopping

and harassing an individual").6            But put aside Darcy's racist

      6The majority mentions (in a block quote above) how Darcy
shared with a trooper colleague his thoughts and feelings about
people who (in his view) look like "thugs."     The reader may be
interested in knowing that Terrel Walker was Darcy's looks-like-
a-thug driver.      Walker, Darcy said, "was a [B]lack male,
approximately late 20s at the time," who was wearing a "wife
beater" — i.e., "a thin undershirt tank top." Darcy spotted Walker
as he (Walker) rolled through the toll booth on I-95, ran his
license plate, followed him, stopped him for "[f]ailing to keep
right except for overtaking or passing," and smelled marijuana. A
drug-sniffing dog alerted officers to the presence of narcotics.
And officers found cocaine and fake Xanax pills. Facing federal
drug charges, Walker asked the district court to dismiss the
indictment given Darcy's targeting him because of his race (a
violation of the Fourteenth Amendment's Equal Protection Clause)
or to suppress the evidence given his lack of reasonable suspicion
for the stop (a violation of the Fourth Amendment's search-and-
seizure clause). See Whren, 517 U.S. at 513, 519 (indicating that
a racial-bias issue like this is an equal-protection problem, not
a search-and-seizure problem). But the government then moved to

                                   - 27 -
motives. I say that because (as the majority correctly says) Fagan

chose to attack the reasonableness of Darcy's suspicion (a search-

and-seizure issue), not Darcy's racially-selective conduct (an

equal-protection issue).      Which (as intimated earlier) means the

key question is whether the record facts and their fairly-drawn

inferences   paint   a   picture   sufficient   to   raise   an   officer's

reasonable suspicion that Fagan changed lanes unsafely.              Again,

unlike the majority, I answer that question with a hard no (even

assuming for argument's sake that Darcy testified credibly).

                                     II

          Time for some background legal principles, most of which

the majority touched on.

                                     A

                                     1

          To justify a car stop, an officer must have at least a

reasonable suspicion — i.e., "specific and articulable facts . . .

taken together with rational inferences from those facts" — that

a traffic offense occurred.        See Terry v. Ohio, 392 U.S. 1, 21

(1968); see also United States v. Miles, 18 F.4th 76, 79 (1st Cir.

2021).   Judges look at all the circumstances in a commonsense way

to see if a particularized and objective basis — viewed from the

perspective of an objectively reasonable officer — existed for

dismiss the indictment, saying that outcome "would be in the best
interests of justice" — a motion the district court granted.

                                   - 28 -
suspecting illegality.       See, e.g., United States v. Arvizu, 534

U.S. 266, 277 (2002); Illinois v. Wardlow, 528 U.S. 119, 125

(2000).    That standard requires something less than probable cause

— but something more than gut feelings or unvoiced hunches.                    See,

e.g., Wardlow, 528 U.S. at 123-24.            And the government bears the

burden of proving it.      See, e.g., Monteiro, 447 F.3d at 43.

                                      2

            Inference-drawing        plays    a     starring    role      in   the

majority's analysis.      So a word or two about it is in order.

            An inference is reasonable if it flows from the basic

facts in evidence.      See, e.g., Terry, 392 U.S. at 21.            To put the

point another way, it "is a reasoned, logical decision to conclude

that a disputed fact exists on the basis of another fact [that is

known to exist]."       See Bickerstaff v. Vassar Coll., 196 F.3d 435,

448 (2d Cir. 1999) (brackets in original and emphases added)

(quoting a leading treatise on federal jury instructions).                      So

guesswork is     not    a reasonable inference, to give an obvious

example.    See, e.g., id.

                                      B

                                      1

            We   give   fresh-eyed    de     novo   review     to   the   judge's

reasonable-suspicion       ruling    but     clear-error       review     to   his

underlying fact-findings, see Miles, 18 F.4th at 78 — all while

"assess[ing] the record evidence in the light most favorable" to

                                    - 29 -
the decision, see United States v. Perez, 977 F.3d 163, 168 (1st

Cir. 2020).

                                  2

           Of all the concepts raised in the preceding sentence,

clear error needs some attention given the importance the majority

and the government place on it.

           The first thing to know is that clear error is not a

particularly illuminating term.       And don't just take my word for

it — take Judge Learned Hand's too.7      "It is," he wrote, "idle to

try to define the meaning of th[at] phrase . . .; all that can be

profitably said" is that a reviewing court — "though it will

hesitate less to reverse" a judge-finding than a jury-finding —

"will nevertheless reverse it most reluctantly and only when well

persuaded."    See United States v. Aluminum Co. of Am., 148 F.2d

416, 433 (2d Cir. 1945).

           But while clear error's meaning "is not immediately

apparent," we can pick out "certain general principles" from the

caselaw.   See Anderson v. City of Bessemer City, 470 U.S. 564, 573

(1985).    Chief among them is that a finding is clearly erroneous

if we "definite[ly] and firm[ly]" decide that the judge made a

     7 For anyone into rankings, Judge Hand "is considered by many
the third-greatest judge in the history of the United States, after
[Oliver Wendell] Holmes and John Marshall; some might even rate
him higher." Richard A. Posner, The Learned Hand Biography and
the Question of Judicial Greatness, 104 Yale L.J. 511, 511 (1994)
(book review).

                               - 30 -
"mistake" — even where "there is evidence to support" the finding.

See United States v. U.S. Gypsum Co., 333 U.S. 364, 395 (1948);

see also McGuire v. Reilly, 250 F.3d 36, 45-46 (1st Cir. 2001);

Irving v. United States, 49 F.3d 830, 836 (1st Cir. 1995).                   So,

for example, a finding is clearly erroneous if the judge accepts

a witness's version of events that is illogical or contradicted by

other physical evidence.         See Mitchell v. United States, 141 F.3d

8, 17 (1st Cir. 1998); Irving, 49 F.3d at 835.             Or, to use another

example,   a    finding     is   also   clearly   erroneous    if   the   judge

"settl[es] for guesswork" instead of "reason[ing] from facts."

See McGuire, 250 F.3d at 46 (emphases added).

           On    the      degree-of-deference     scale,    clear   error     is

"conventionally regarded" as a less deferential model than abuse

of discretion.       See Haugh v. Jones & Loughlin Steel Corp., 949

F.2d 914, 916-17 (7th Cir. 1991) (Posner, J., for the court).                And

while the standard is "formidable, it is not" (to use a different

metaphor) "a juggernaut that crushes everything in its path."                See

Uno v. City of Holyoke, 72 F.3d 973, 978 (1st Cir. 1995); see also

Jose Santiago, Inc. v. Smithfield Packaged Meats Corp., 66 F.4th

329, 340-41 (1st Cir. 2023).

           A key takeaway then is that clear-error review — though

certainly respectful — is not (to use yet another metaphor) a one-

way   ticket    to   an   affirmance.      See,   e.g.,    United   States    v.

Henderson, 463 F.3d 27, 44-45 (1st Cir. 2006) (vacating on clear-

                                    - 31 -
error review a judge-finding made after a suppression hearing);

United States v. Forbes, 181 F.3d 1, 7-8 (1st Cir. 1999) (same).

                                           III

                 Now time for a recap of Darcy's testimony (given at both

hearings) and the judge's reasoning (reflected in both decisions)

for denying Fagan's suppression motion.

                                           A

                 Tracking Fagan's travels just because (to quote the

majority) "Fagan, a Black man, fit Darcy's profile" of a drug-

dealing "thug[]," Darcy eventually drove up behind him.                   Fagan at

that point was behind a tractor trailer.                  And all three (Darcy,

Fagan, and the trucker) were in the slow lane.

                 According to Darcy, Fagan then moved to the middle lane,

passed the truck, and switched back to the slow lane.8                     No one

disputes that Darcy was still behind the tractor trailer when Fagan

made       the    switch-back   and   so    could   not    see    that   maneuver.

Unsurprisingly then, Darcy could not specify the distance between

Fagan and the trucker when the switch-back occurred. Perhaps eager

to fill in that gap, Darcy still said that "very little distance"

separated "the two" at that critical moment.                     Darcy added that

Fagan had gotten back in "that lane close enough in front of that

tractor trailer that if [he (Fagan)] had to stop short[] [he] would

       Like the parties and the majority, I use "tractor-trailer,"
       8

"tractor trailer," and "truck" interchangeably.

                                      - 32 -
have caused a collision, most likely."               And Darcy later said that

about "a second" after the switch-back, he could see Fagan's car

"maybe three or four car lengths" ahead of the truck.

             Looking to score points, the defense got Darcy to admit

that he only saw Fagan's "whole vehicle for the first time" once

he (Darcy) moved to the center lane.             The defense later asked Darcy

whether    he   based    his   unsafe-lane-change         assessment      "on   [the]

distance between the truck and the vehicle" — to which he answered,

"[y]es, . . . it was the manner in which [Fagan] essentially, for

lack of a better term, cut off the tractor trailer, changing into

[the slow] lane too close to the tractor trailer."                   But then when

asked by the defense whether he "could[] measure how many feet

[Fagan] was in front of the truck," Darcy replied he "could not

. . ., that is correct."           Nor could Darcy estimate Fagan's speed

when he (Fagan) got in front of the tractor trailer.                        And when

asked by the defense to "acknowledge in the [dashcam] video that

. . . you can never see the actual front of the truck," Darcy came

back with "[c]orrect."9          Darcy also agreed with the defense that

he believed that Fagan "almost crashed into" the tractor trailer,

but "acknowledge[d]" that "the truck never put its brakes on" and

     9   Again, the video is accessible at https://www.ca1.uscourts.gov/citationsmedia.

                                       - 33 -
"never swerved."      "Whether the [trucker] had to downshift to avoid

[Fagan]" Darcy did not know either.

                                        B

           Denying the suppression motion, the judge at one point

framed the relevant issue as "whether Darcy lied in saying that

Fagan executed an unsafe return to the right-hand lane."                     That

mattered, the judge wrote, because "[i]f Fagan's maneuver was not

unsafe, then the hypothetical reasonable police officer had no

basis to pull him over."         Paraphrasing the testimony, the judge

noted that Darcy said that Fagan

           cut off the tractor trailer, that it was very
           close to the front of the tractor trailer, not
           leaving much space for any reaction time, did
           not leave a safe distance in between as it cut
           in front of the vehicle, and if it had to stop
           shortly it would have caused a collision most
           likely.

And the judge ultimately found Darcy's account "credible," even

after "[a]ssuming" he (Darcy) "singled out Fagan's vehicle for

improper reasons as it went through the . . . toll plaza."

           Convinced that the dashcam video did not "contradict[]"

Darcy's testimony, the judge noted that the footage "appear[ed]"

to show "that [Fagan's] return to the right lane was abrupt."                The

judge   also    noted   that   the     video   never    showed   the   trucker

"activating his brakes or taking evasive maneuvers." But the judge

discounted     that   fact   because   he   had   "no   idea   how   alert   the

[trucker] was or how aggressively he drove."            So the judge did not

                                     - 34 -
consider the video conclusive either way on the safety question.

And even though the judge "[could not] determine the actual

separation distance between the two vehicles," he held "the traffic

stop was lawful."

                                         IV

           Time then for my take on the issue.

                                         A

           From the just-given recap one can see that Darcy tied

his unsafe-lane-change theory to Fagan's supposedly cutting off

the tractor trailer at so close a distance as to create an almost-

crash   situation    —   an    account    the    judge    credited   in   finding

reasonable suspicion.         The majority and the government offer lots

of   reasons   why   they     think    the      judge's   reasonable-suspicion

conclusion holds together.        But none is convincing, at least by my

lights.

                                         B

                                         1

           Picking up on one of the government's arguments — an

argument centered on downplaying how the truck blocked Darcy's

view of Fagan's switch-back — the majority points to Darcy's

testimony that about a second after Fagan's return to the slow

lane, he could see Fagan's car maybe "three or four car lengths"

ahead of the truck.       Ignore for present purposes that the record

                                      - 35 -
never says what Darcy meant by car length.10                 And assume for

argument's sake that Darcy had in mind 15 feet, which is roughly

the length of the average car.          See Susan Meyer, Study:       Average

Car Size is Increasing — Will Roads Still be Safe for Small Cars

and Pedestrians?, https:www.thezebra.com/resources/driving/avera

ge-car-size (last visited June 8, 2023).               So Darcy essentially

said that Fagan was about 45 to 60 feet ahead of the truck a second

after the pass.11     Neither the majority nor the government argues

— and the judge never found — that that amount of space is too

small for a safe lane change. Instead the majority (emphasis mine)

contends that we should infer that Fagan must have been "quite a

bit closer" than that to the truck.             The theory goes something

like this (the quotes come from the majority):           "[T]he lane change

from    start   to   finish   took    roughly   four    to   five   seconds."

"[A]ssuming just a five mile per hour speed differential," and

supposing "that the elapsed time was five seconds, not six," the

       It does not take an automotive engineer to know that cars
       10

come in many sizes.   According to one website, a "mini-car" is
about 10 feet long, a "mid-sized car" is about 15 feet long, a
"full-sized car" is about 16 feet long, a "small SUV" is about 14
feet long, and a "large SUV" is about 17 feet long. See Gerard
Stevens, Average Car Length: All You Need to Know About It, Way,
https://www.way.com/blog/average-car-length (last visited June 8,
2023).
       To give a sense of perspective, a gap of 45 to 60 feet is
       11

(roughly) equivalent to a typical 4 to 6 story building laid on
its side.     See How Tall is a Storey in Feet?, Skydeck,
https://theskydeck.com/how-tall-is-a-storey-in-feet (last visited
June 8, 2023). That is no small thing, to state the obvious.

                                     - 36 -
majority "estimate[s] that at the time Fagan began" the "abrupt[]"

switch-back, "the distance between the vehicles may have been very

tight; i.e., it could have been as little as between 9 and 24

feet." The majority then coats its theory with the veneer of (what

it calls) "simple math":

      5 𝑚𝑖𝑙𝑒𝑠 5280 𝑓𝑒𝑒𝑡      ℎ𝑜𝑢𝑟
             ×          ×              × 5 𝑠𝑒𝑐𝑜𝑛𝑑𝑠 = 36.67 𝑓𝑒𝑒𝑡 𝑐𝑙𝑜𝑠𝑒𝑟
       ℎ𝑜𝑢𝑟     𝑚𝑖𝑙𝑒      3600 𝑠𝑒𝑐𝑜𝑛𝑑𝑠

"45 to 60 feet minus 36 feet" gets you to "between 9 and 24 feet,"

the majority writes.        But the majority can get no mileage from

that argument.

                                    (i)

          Stepping back, some things are clear.

          First,    given    the   distance   between    Fagan's    car   and

Darcy's cruiser, with an intervening truck and all three vehicles

basically going straight, one cannot — simply by watching the

dashcam video — reasonably calculate the space between Fagan's

auto and the truck's front when Fagan switched to the slow lane.

Indeed the judge (recall) admitted that he could not make that

determination.     But one can see that the trucker did not react as

a trucker reasonably could be expected to react after an almost-

crash-causing cut off. The video shows no brake lights, no swerve,

no sign of any engine slowdown, for example.

          The majority concedes that that list of nos "strongly

suggests that the [trucker] felt no danger."             But the majority

                                   - 37 -
(emphasis mine) theorizes that perhaps the trucker "may have

disagreed" with Darcy about "whether Fagan cut off the [truck]" in

an unsafe way, then adding too that "reasonable people can disagree

on what is objectively safe."        Call me unconvinced.      Keeping in

mind that our review of the evidence must be commonsensical, see

Wardlow, 528 U.S. at 125, I think it strains common sense to

suggest that a reasonable trucker faced with an almost-crash set-

up (which is how Darcy described it) would not react in some way.

What the majority is doing is relying on a hunch or a guess instead

of facts or rational inferences drawn from facts — the "may have

disagreed" language is a tip off.           And (to repeat) reasonable

suspicion — while not the toughest of standards — certainly demands

more.    See id. at 124; see also McGuire, 260 F.3d at 46; United

States v. Espinoza, 490 F.3d 41, 48 (1st Cir. 2007).

              Echoing the judge's reasoning, the government (but not

the majority) supposes — without any supporting evidence — that

the trucker may have, might have, or could have driven carelessly

or aggressively.      But as just explained, sheer speculation — which

is all this really is (Darcy, for instance, never testified that

the trucker drove improperly) — affords no basis for assuming that

something that could have possibly occurred actually did occur.

See Wardlow, 528 U.S. at 123-24; McGuire, 260 F.3d at 46; Espinoza,

490 F.3d at 48.       See generally Gomez v. Stop & Shop Supermarket

Co.,    670    F.3d   395,   398   (1st   Cir.   2012)   (stressing   that

                                   - 38 -
"[a]ssumptions are not a substitute for evidence"); Jane Doe No.

1 v. Backpage.com LLC, 817 F.3d 12, 25 (1st Cir. 2016) (warning

about   the    folly    of   "pyramid[ing]     speculative    inference        upon

speculative inference").

              Second,   while   the    government   (but   not     so   much    the

majority) alludes to some hints in Darcy's testimony that he had

a better vantage than his dashcam, the fact remains that he offered

no (as in zero) facts showing the distance between Fagan's auto

and the truck at the time of the lane switch — only conclusory

characterizations of the vehicles being "too close," "close enough

. . . that if the [truck] had to stop short it would have caused

a collision, most likely," and there being "very little distance

between the two."         Critically as well, Darcy (recall) conceded

that he could not estimate the distance between Fagan's car and

the truck when Fagan passed in front of it.            And he (recall also)

conceded that he only saw Fagan's "whole vehicle for the first

time" once he (Darcy) moved to the center lane following Fagan's

return to the slow lane.              As the party burdened with showing

reasonable suspicion, the government had every incentive — and

opportunity — to pin the separation distance down.                 That it could

not speaks volumes.

              Third,    while   the    government   (but     not    really      the

majority) makes much of the judge's remark that the dashcam video

did "not contradict[]" Darcy's story, Darcy's concessions — his

                                      - 39 -
not being able to estimate the distance between Fagan and the truck

or Fagan's speed (after Fagan moved back to the slow lane), and

his not seeing (at that critical juncture) the trucker flash his

brake lights or take evasive action — undermine any suggestion of

an unsafe lane change based on a near-crash cut off.   See generally

Anderson, 470 U.S. at 574 (telling appellate courts to confirm

that the judge's findings are "permissible" or "plausible in light

of the record viewed in its entirety" (emphases added)).

          Fourth, while the government (but not the majority)

implies that the dashcam video "corroborated" all of Darcy's

unsafe-lane-change testimony because the footage supported his

late-turn-signal claim, any such argument fails.         First off,

everyone knows — as a matter of legal logic and common sense —

that a witness may be credible on some issues but not on others.

See generally First Circuit Pattern Criminal Jury Instructions

§ 1.06 (making clear that when it comes to witness credibility,

factfinders "may believe everything a witness says or only part of

it or none of it" (emphasis added)); see also generally Peak v.

United States, 353 U.S. 43, 46 (1957) (noting that "common sense

often makes good law").   But the larger point is that while the

video does confirm Darcy's claim of a late signal, it does not (as

I keep saying) confirm his claim of a too-close lane change that

resulted in an almost-crash episode.     And neither does Darcy's

                              - 40 -
testimony read in its entirety, including most importantly his

(much-discussed) concessions.

                                      (ii)

            This brings me back to the majority's central thesis

(resembling the government's, and built on a hoped-for inference)

that Fagan must've been "quite a bit closer than three to four car

lengths when he began moving abruptly into the tractor-trailer's

lane."    Making what it thinks is a "[c]onservative[]" assumption

that Fagan was going just 5 miles per hour faster than the trucker,

the majority (as noted) uses this formula to show that there "could

have been as little as between 9 and 24 feet" separating the

vehicles when Fagan began the switch-back and so drove unsafely:

         5 𝑚𝑖𝑙𝑒𝑠 5280 𝑓𝑒𝑒𝑡      ℎ𝑜𝑢𝑟
                ×          ×              × 5 𝑠𝑒𝑐𝑜𝑛𝑑𝑠 = 36.67 𝑓𝑒𝑒𝑡 𝑐𝑙𝑜𝑠𝑒𝑟
          ℎ𝑜𝑢𝑟     𝑚𝑖𝑙𝑒      3600 𝑠𝑒𝑐𝑜𝑛𝑑𝑠

The majority gets between 9 and 24 feet by subtracting 36 feet

from 45 to 60 feet.

            "Garbage in, garbage out" is a concept familiar to

mathematicians. It means (in less vivid terms) that a faulty input

produces a faulty output.        See Garbage in, garbage out, Wikipedia,

https://en.wikipedia.org/wiki/Garbage_in,_garbage_out                       (last

visited June 8, 2023).           And the majority runs into that very

problem — i.e., the appearance of precision suggested by the

majority's calculations is illusory, because bad info (which we

                                     - 41 -
have here) assures a bad result, proving that a formula is only as

good as the data behind it.

            One of the majority's key assumptions is that Fagan could

not have been 3 to 4 car lengths ahead of the trucker when he

(Fagan) crossed the dashed-lane lines during the switch-back.

Another is that the trucker's speed did not change as Fagan

completed   the   merge.    But   why   should   anyone   accept   either

assumption?    Darcy offered no testimony and the judge made no

finding on how far ahead of the trucker Fagan was as he crossed

back into the trucker's lane.       Ditto on how fast Fagan and the

trucker were going during that critical time. So in the majority's

fact-free world of conjecture (at least on the crucial questions),

nothing would stop us from instead supposing that as Fagan crossed

the dashed-lane lines separating the middle and slow lanes — after

already being 45 to 60 feet ahead of the truck — the trucker then

matched the 5-miles-per-hour increase.12         Such an increase would

     12  Interestingly, going by the standard broken-line-
interstate-highway-measurement method, it seems like the distance
at the point of Fagan's lane change was around 60 feet. See U.S.
Dep't of Trans., Manual on Uniform Traffic Control Devices for
Streets and Highways, Pt. 3, Ch. 3A, § 3A.06, Guidance 04 (2009)
(explaining that each dashed-lane should be "10" feet long and
"30" feet apart); see also Me. Dep't of Trans., Traffic Engineering
Striping & Stenciling Handbook 4 (2019) (noting that a "[b]roken
line pavement marking[] . . . is 10 foot long" and "separated by
30 foot long gaps," though "[o]n the freeway" it "would be . . .
15 feet long with 25 foot gaps").

                                  - 42 -
cancel out Fagan's, changing the first numerator in the majority's

equation from 5 miles to 0 miles:

            0 𝑚𝑖𝑙𝑒𝑠 5280 𝑓𝑒𝑒𝑡       ℎ𝑜𝑢𝑟
                   ×          ×              × 5 𝑠𝑒𝑐𝑜𝑛𝑑𝑠 = 0 𝑓𝑒𝑒𝑡 𝑐𝑙𝑜𝑠𝑒𝑟
             ℎ𝑜𝑢𝑟     𝑚𝑖𝑙𝑒      3600 𝑠𝑒𝑐𝑜𝑛𝑑𝑠

That would turn the majority's 9 to 24 feet differential claim

into a 45 to 60 feet differential claim.              Which (in other words)

would leave a 3 to 4 car length separation distance right after

the switch-back — a distance not even the government says is

unsafe.13

              Next consider the majority's choice to use 5 seconds in

its formula — i.e., the time it took for the switch-back, from

     13 Trying to refute these details, the majority (emphasis
mine) calls the "possibility that Fagan did not maintain or even
increase that greater speed throughout the lane change" "counter-
intuitive." As if to drive that idea home, the majority (again
emphasis mine) notes that the video "shows that Fagan's car was
clearly going visibly faster than the tractor-trailer just before
it began the lane change." I get that Fagan went faster than the
trucker before the switch-back started (you'll get no argument
from me on that). But I see nothing in the record showing that
the trucker couldn't have sped up as Fagan crossed the dashed-lane
lines.   The majority also says that if the tractor-trailer had
accelerated "when its driver saw Fagan in its lane," then "Fagan
would still have been three to four car lengths ahead when Darcy
got beside the tractor-trailer" — but, insists the majority, "the
video plainly shows" that that did not happen. Yet Darcy himself
agreed that when he got into the center lane with the truck in the
immediate right lane, his dashcam "video" "show[ed]" Fagan "three
or four car lengths in front of the tractor trailer." That the
video (as the majority notes as well) then "shows Fagan moving
away and quickly leaving enough space for Darcy's cruiser to pass
in front of tractor-trailer" does not change my thinking either.
Maybe Fagan sped up after Darcy spotted him 3 to 4 car lengths
ahead of the trucker — or maybe (to continue operating in the
majority's zone of speculation) the trucker (with a statie now
coming up on his side) eased off the gas.

                                      - 43 -
beginning to end.       The majority calls that "the relevant" period.

But what mattered to the judge (understandably, in my view) was

the "actual separation distance" once Fagan "returned" to the slow

lane "after passing the tractor-trailer."                On that score, the

uncontestedly safe distance of 3 to 4 car lengths came from Darcy's

testimony on how far ahead of the truck Fagan was "roughly a

second" after the switch-back.           And using 1 second rather than 5

seconds (i.e., keying in on the 1 second period between when Fagan

completed the merge and when Darcy saw Fagan 3 to 4 car lengths in

front of the trucker), but still keeping the 5-miles-per-hour

assumption, gives us this:

          5 𝑚𝑖𝑙𝑒𝑠 5280 𝑓𝑒𝑒𝑡       ℎ𝑜𝑢𝑟
                 ×          ×              × 1 𝑠𝑒𝑐𝑜𝑛𝑑 = 7.33 𝑓𝑒𝑒𝑡 𝑐𝑙𝑜𝑠𝑒𝑟
           ℎ𝑜𝑢𝑟     𝑚𝑖𝑙𝑒      3600 𝑠𝑒𝑐𝑜𝑛𝑑𝑠

That would put Fagan 7 feet closer to the trucker by the time he

(Fagan) completed the switch-back, leaving 38 to 53 feet (45 to 60

feet minus 7) between the two14 — a distance not even the government

says is unsafe.

            The    bottom    line   is   that    accepting    the    majority's

evidence-free     36-feet-closer      theory    (inspired    in   part     by   the

government) moves us far beyond reasonable inference and into the

     14That is a pretty big gap too. It is a more than one but
less than two average-sized telephone poles laid on the ground.
(A typical telephone pole is about 30 feet high.       See Rich
Vishneski, Telephone Poles — The More You Know!, DL Howell (Jan.
24, 2020), https://www.dlhowell.com/blog/telephone-poles (last
visited June 8, 2023).)

                                     - 44 -
forbidden realm of speculative imaginings.              See generally Ornelas

v. United States, 517 U.S. 690, 699 (1996) (holding that we must

"give     due    weight   to    inferences"    from   the   "facts"   of   record

(emphasis added)).15           Maybe that is why the judge did not rely on

any must-have-been-even-closer theory in reaching his decision

(even though the government pushed that idea (or a variation of

it) below).16

                                         2

                Hyping the judge's comment that the video "appears" to

show an "abrupt" lane change, the government also reminds us that

a factfinder's choice among supportable views of the evidence

cannot be clearly erroneous — the government seems to be suggesting

that "abrupt" equals "unsafe" (the majority apparently agrees).

It should go without saying (though I will say it nonetheless)

     15 All that speculation shows just how wrong the majority is
to claim that "[t]he video bears twice on the issue of the speed
deferential." The majority's claim is also out of place given how
the judge (emphases mine) twice found the video "not definitive
one way or the other" on the separation-distance issue — a finding
the majority says is "not . . . clearly erroneous."
     16The majority is right that courts must "respect . . . the
ability of trained and experienced police officers to draw from
the attendant circumstances inferences that would 'elude an
untrained person.'" United States v. Tiru-Plaza, 766 F.3d 111,
116 (1st Cir. 2014) (footnote omitted and quoting United States v.
Cortez, 499 U.S. 411, 418 (1981)). But courts value inferences
drawn from the hard "facts," see id. at 117 (emphasis added and
quoting Terry, 392 U.S. at 27) — not (as we have here) speculative
suppositions on important issues (like the vehicles' relative
speeds).

                                      - 45 -
that abrupt cannot always equal unsafe (think of an abrupt change

with no cars in the return lane).       Anyway the key word here is

supportable — i.e., "anchored in probative evidence" on complete-

record review.   See McGuire, 260 F.3d at 45 (emphasis added).

Darcy's reasonable-suspicion claim stands — or more accurately

falls (as I've been saying) — on the notion that Fagan cut off the

truck in a near-crash event.     But no one — not Darcy, not the

judge, not the government, not this panel — knows the actual

separation distance between Fagan's car and the truck or saw the

truck's brake lights go on (I know I sound like a broken record,

though necessarily so).    See id. at 45-46 (stamping a finding

implausible after whole-record review, thus making the finding

clearly erroneous).

                                 3

          Still hoping to rebut Fagan's points that Darcy could

not see in front of the truck and did not know the distance between

the vehicles, the government says none of that matters.      To the

government's way of thinking (though not the majority's as far as

I can tell), "[t]he existence . . . of some possibility" that Fagan

violated no traffic law "does not nullify an officer's reasonable

suspicion."   That is so — and here's the important part for its

theory — because an officer "need not rule out the possibility of

innocent conduct" to have reasonable suspicion (the quote comes

from Arvizu, 534 U.S. at 277).   While deeply-rooted, the "need not

                               - 46 -
rule out" rule does not help the government in the least.           An

officer, after all, need not draw nonsuspicious inferences if

sufficient   facts   establish   reasonable   suspicion.   See,   e.g.,

Arvizu, 534 U.S. at 277-78.      So (once more) to get anywhere the

government had to show that Darcy had an objective basis for

reasonably suspecting that Fagan made an unsafe lane change.       And

(once more again) Darcy's concessions — his inability to fix the

distance between Fagan and the truck or Fagan's speed (after Fagan

switched back to the slow lane), and his not glimpsing (at that

key period) the trucker brake or drive defensively — put that

objective out of reach.

                                   4

            In something of a final push, the government — citing to

a Maine high court opinion mentioned by the majority, Pooler v.

Clifford, 639 A.2d 1061 (Me. 1994) — writes that Fagan's tardy

turn signal should factor into a court's reasonable-suspicion

analysis:    Pooler interpreted Maine law as saying that sometimes

a signal may be needed for safety reasons, sometimes not (the

majority seems to embrace the government's argument, by the way).

See id. at 1062.     But

            it is not enough . . . for the district court
            to base its factual findings on some evidence
            in the record.     The clear error standard
            authorizes us to reverse a finding, not
            unless, but "'although there is evidence to
            support it.'"

                                 - 47 -
Latif v. Obama, 666 F.3d 746, 766 (D.C. Cir. 2011) (Henderson, J.,

concurring) (quoting Anderson, 470 U.S. at 573, in turn quoting

U.S.   Gypsum     Co.,    333   U.S.       at       395)   (emphases   added   by   Judge

Henderson).      See generally Easley v. Cromartie, 532 U.S. 234, 257

(2001) (finding clear error even though "the record contains a

modicum of evidence offering support for the District Court's

conclusion" that a state legislature used race as the predominate

factor    in    drawing     a   congressional              district,   because      "[t]he

evidence,      taken     together,     .    .       .   does   not   show   that    racial

considerations predominated" (emphases added)).                             That crucial

detail aside, Darcy (as the majority notes) offered two grounds

for the pull over — the late signal and the cutting off of the

truck in an almost-crash way.                   And a fair reading of the judge's

order is that he pinned his reasonable-suspicion analysis on the

second ground — a ground that is not "permissible" or "plausible"

on complete-record review.             See Anderson, 470 U.S. at 574.                True,

we may affirm a suppression order on any basis supported by the

record.     See United States v. McGregor, 650 F.3d 813, 824 (1st

Cir. 2011).      But the government offers no convincing reason to use

Fagan's delayed signal in that way (indeed the government's brief

does not even mention the affirm-on-any-ground rule).

                                                5

               The majority ends its reasonable-suspicion section by

criticizing my focus on "Darcy's characterization of the lane

                                           - 48 -
change as cutting off the tractor-trailer at so close a distance

as to create an 'almost-crash situation.'"          Darcy's account —

credited below, as the majority notes — shaped the judge's unsafe-

lane-change finding from start to finish.        That account — which

unquestionably alleged a near-crash scenario — made separation

distance a major concern (as the judge said).           But (for the

umpteenth time) neither he nor the judge could calculate that

number.   And the majority's unfounded speculation — unfounded

because no knows the actual separation distance, or for that matter

the drivers' relative speeds — certainly cannot fill the hole (as

I've also been at pains to say).       Which seems like a topic worthy

of focus, given how reasonable suspicion requires us to consider

"the whole picture," see Cortez, 449 U.S. at 417, so we do not

miss the larger situation.

                                   V

          All in all, the majority's position (based largely on

the government's) is too long on guesses and too short on facts to

sustain the judge's conclusion that a reasonable trooper in Darcy's

shoes would have suspected that he had seen an unsafe lane change.

So I would reverse the denial of Fagan's suppression motion, vacate

his conviction and sentence, and remand for further proceedings.17

     17Given my take on the stop issue, I need not (and so do not)
discuss any of Fagan's other grounds for reversal — including
claims that officers unlawfully prolonged the traffic stop and
violated his Miranda rights, and that the judge wrongly denied

                              - 49 -
         And I must respectfully — but emphatically — dissent

from the majority's contrary holding.

some of his racial profiling-related discovery requests. See PDK
Lab'ys Inc. v. U.S. D.E.A., 362 F.3d 786, 799 (D.C. Cir. 2004)
(Roberts, J., concurring in part and concurring in the judgment)
(declaring that "if it is not necessary to decide more, it is
necessary not to decide more").

                             - 50 -