United States v. Diaz ( 2010 )


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  •                                                                          FILED
    United States Court of Appeals
    Tenth Circuit
    UNITED STATES COURT OF APPEALSDecember 11, 2009
    TENTH CIRCUIT                 Elisabeth A. Shumaker
    Clerk of Court
    UNITED STATES OF AMERICA,
    Plaintiff-Appellee,
    v.                                                     No. 09-2090
    (D.C. No. 07-CR-00701-LH)
    JESUS MANUEL DIAZ,                                   (D. New Mexico)
    Defendant-Appellant.
    ORDER AND JUDGMENT *
    Before BRISCOE, BALDOCK, and HARTZ, Circuit Judges.
    Defendant-Appellant Jesus Manuel Diaz was convicted by a jury of
    possession with intent to distribute 1,000 kilograms or more of marijuana in
    violation of 21 U.S.C. § 841(b)(1)(A). On appeal Diaz challenges his conviction
    on five grounds alleging that: (1) the district court erred in denying his motion to
    suppress evidence of the marijuana; (2) the evidence adduced at trial was
    insufficient to support his conviction; (3) the district court improperly instructed
    *
    This order and judgment is not binding precedent, except under the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.
    the jury; (4) the district court improperly admitted the testimony of two law
    enforcement officers; and (5) the district court committed three other evidentiary
    errors which cumulatively denied him the ability to present a defense. We have
    jurisdiction pursuant to 28 U.S.C. § 1291 and AFFIRM Diaz’s conviction.
    I.
    Jesus Manuel Diaz is the owner-operator of a one rig trucking company
    known as JD Easyline. On March 19, 2007, Diaz drove his tractor-trailer
    eastbound through the Gallup, New Mexico, Port of Entry located on Interstate 40
    near the Arizona border. The drive-up credentials booth was closed that morning
    so Diaz got out of his truck and entered the lobby at 9:40 a.m. in pursuit of the
    permits necessary to drive his tractor-trailer across New Mexico.
    Once inside, Diaz encountered James Smid, a Motor Transportation
    Division officer with the New Mexico Department of Public Safety. Diaz
    provided Officer Smid with his commercial driver’s license and the various other
    items necessary to complete the permit paperwork. According to the bill of
    lading and weight scale ticket Diaz presented to Officer Smid, Diaz’s load
    consisted of 9,762 pounds of Dollar Store merchandise and the gross weight of
    his tractor-trailer was 56,760 pounds.
    These weights concerned Officer Smid. Based on his experience, both as a
    commercial truck driver and as public safety officer, Smid knew that an empty
    tractor-trailer with fuel weighs between 32,000 and 33,000 pounds. Thus, he
    2
    believed that if Diaz’s load were in fact 9,762 pounds, the gross weight of Diaz’s
    tractor-trailer would be approximately 42,000 pounds. This left approximately
    14,000 pounds unaccounted for by Diaz’s paperwork. Smid was also confused by
    the fact that Diaz had chosen to “scale out” when he was well below the
    applicable weight limit.
    At 9:45 a.m., with his interest piqued, Officer Smid informed Diaz that he
    was going to perform a Level Two Regulatory Inspection of his tractor-trailer. A
    Level Two Inspection is a process authorized by N.M. Stat. Ann. § 65-5-1 which
    allows a safety officer to ensure that a tractor-trailer is in compliance with all
    applicable laws and regulations by examining the vehicle and performing a more
    in-depth review of the driver’s relevant paperwork.
    Officer Smid began his Level Two Inspection of Diaz’s tractor-trailer by
    reviewing Diaz’s logbook. It showed that Diaz had not driven for the first several
    weeks of March and that Diaz had in fact been in California since January 19,
    2007. Officer Smid felt that such a long stretch of downtime was strange for a
    sole proprietor trucker, particularly because although Diaz listed Baxley, Georgia
    as his home, he had spent the downtime in California. Smid asked Diaz about this
    and Diaz claimed that he had been sick with the flu in California for the entire
    two months.
    Officer Smid then began to question Diaz about the weight discrepancies
    indicated by his paperwork. Diaz attempted to explain the unaccounted weight by
    3
    telling Officer Smid that sometimes shippers put more on to a trailer than is
    indicated in the bill of lading. Officer Smid found this explanation odd given that
    in his experience legitimate shippers only ship what is listed in the bill of lading.
    During his review of Diaz’s paperwork, Officer Smid also noticed a marked
    change in Diaz’s demeanor. Diaz began lowering his head, rubbing his lips with
    his hand, and scratching his neck. This was of note to Smid because Diaz had not
    exhibited any of this behavior during the initial permitting process. At this time
    Diaz also offered a second story regarding his downtime in California, this time
    informing Smid that he had spent some of the time in Mexico visiting family and
    friends.
    With the document review portion of the Level Two Inspection complete,
    Officer Smid instructed Diaz to pull his tractor-trailer into an inspection bay so
    that he could inspect the vehicle itself. As Officer Smid inspected the outside of
    the vehicle he first noted a lock and seal on the trailer’s doors. Officer Smid felt
    that this was unusual because based on his experience, a relatively small load of
    Dollar Store merchandise would not be locked and sealed.
    Officer Smid then began to inspect the cab of the tractor—a routine part of
    a Level Two Inspection. While inside Smid noticed that Diaz did not have a
    citizen’s band or CB radio, which he felt was unusual for a commercial trucker.
    Smid asked Diaz why he did not have a CB radio and Diaz told Smid he had sold
    it because he needed money. Officer Smid also discovered four cell phones in
    4
    Diaz’s cab. Smid thought this was significant because in the over 2,500
    inspections he had conducted, he had discovered multiple cell phones in only
    about thirty instances, nearly all of which eventually resulted in the discovery of
    contraband as well. Officer Smid also felt that Diaz’s paying for four cell phones
    was not consistent with his statement that he sold his CB radio because he needed
    the money.
    Officer Smid then moved on to check the load in Diaz’s trailer. Diaz had
    informed Smid that the shipper had sealed and locked the load. Again, Smid felt
    that it was unusual that a load of this nature would have been sealed and locked.
    Upon further examination Smid was also concerned by the fact that the seal on
    the trailer’s door was a commercially available seal, not unique to the shipper. In
    Smid’s experience this was not a typical practice.
    When the doors of the trailer swung open, Officer Smid detected a strong
    odor of air freshener. Smid thought this was strange because the bill of lading did
    not indicate that Diaz was transporting any air fresheners. Further, in Officer
    Smid’s experience, drug traffickers had used air fresheners in an attempt to
    conceal the contraband they were transporting.
    Officer Smid then viewed the contents of the trailer. It was packed very
    tightly with pallets of boxes lining its entire length. In the middle were large
    bundles of clear plastic shrinkwrap. Officer Smid noticed that the boxes toward
    the nose of the trailer had a large amount of dust on them while the boxes toward
    5
    the rear of the trailer, or near its doors, did not. In Officer Smid’s experience this
    was consistent with the use of a “cover load,” or a group of boxes that remain in a
    trailer over the course of multiple drug runs, each time aiding in the driver’s
    attempt to appear legitimate. During this time Officer Smid also looked back at
    Diaz on at least one occasion, but Diaz would not look at Officer Smid.
    Confident now in his belief that Diaz’s trailer contained contraband,
    Officer Smid terminated his Level Two Inspection at 10:17 a.m. and asked
    another officer to call Officer Hermillo Lucero, a K-9 officer. Although it is
    unclear whether Smid returned Diaz’s paperwork to him at this time, Smid did ask
    Diaz if he could ask him a few more questions, and Diaz agreed. Officer Smid
    asked Diaz if there was any cocaine, heroin, or methamphetamine in his truck and
    Diaz promptly answered “no” to each of these questions. When Smid asked Diaz
    if there was any marijuana in his trailer, however, Diaz hesitated, turned away
    from Smid, and laughed nervously before saying “no” again.
    Officer Smid then asked Diaz if he could perform a more thorough search
    of the tractor-trailer and Diaz verbally agreed. Smid then produced a consent
    form—in Spanish because Diaz indicated he was more fluent in that
    language—which was read to Diaz. Diaz signed this consent form at 10:30 a.m.
    and Officer Smid began his subsequent search at 10:35 a.m.
    At this point Officer Dave Halona arrived and stayed with Diaz while Smid
    began searching the cab of the tractor. As he entered the cab, Diaz informed
    6
    Smid that there was $1,500 in cash in a bag in the cab. Diaz said that he had
    received the cash as an advance for costs from the broker who got him the job.
    Based on his experience, Officer Smid felt that this was an unusual practice.
    Further, he felt that it was odd that the cash was is small denominations. Officer
    Smid’s search of the cab ended at approximately 10:55 a.m.
    Officer Smid then moved back to the trailer. The smell of air freshener
    became stronger as he moved toward the middle of the trailer. He proceeded to
    open one of the boxes and discovered a seat cushion in a state of disrepair that
    indicated to Smid that it was not legitimate merchandise. He continued to
    diligently move and search the boxes by himself for approximately an hour.
    Then, at 11:55 a.m., Smid called Officer Lucero to see how long it would be
    before he arrived with the canine unit. Officer Lucero said he would be there
    shortly.
    Smid continued to search the trailer without taking a break until Officer
    Lucero arrived at 12:15 p.m. Shortly after he arrived, Officer Lucero ran his dog
    around the outside of Diaz’s trailer and it alerted on the front left corner. The
    dog did not, however, alert inside the trailer. Nonetheless, Officers Smid and
    Lucero decided to conduct a further hand search of the trailer.
    As they moved several more of the boxes in the trailer the officers
    discovered a plywood tunnel that had been built into the trailer. Officer Smid
    crawled into the tunnel and discovered a large plastic bag. He cut the package
    7
    open and discovered marijuana. The officers then arrested Diaz at 12:45 p.m.
    before finishing their search which eventually produced 230 bundles of marijuana
    weighing more than 3,300 pounds.
    At Diaz’s trial, the following additional facts were adduced. First, a laptop
    computer and printer were discovered in the cab of Diaz’s tractor and a computer
    forensics expert testified that a program used to create bills of lading had been
    deleted from the computer the day before Diaz was arrested. Also, it was
    discovered that Diaz already had a bill of lading for a return trip from Georgia
    which was identical in every way to the one he presented to Officer Smid in
    Gallup except that the cargo was listed in a different order. And a Dollar Store
    manager from California, Homer Gonong, testified that the Dollar Store does not
    ship in bulk, a single company services the company’s southern California
    trucking needs, the contact listed on Diaz’s bill of lading does not work for the
    Dollar Store, and the type of bill of lading that Diaz presented was not one that
    the Dollar Store used.
    Further, a receipt for shrinkwrap was discovered in Diaz’s cab, the seal on
    the trailer’s door was found to be within the sequence of seals found in Diaz’s
    cab, and it was determined that all four of the cell phones found in Diaz’s cab
    were “throw away” phones, only one of which had any connection to Diaz or his
    company. Finally, Drug Enforcement Agency Agent Kevin Garver testified that
    many of Diaz’s practices were consistent with drug trafficking operations that he
    8
    had previously investigated.
    On March 20, 2007, a criminal complaint was filed in the United States
    District Court for the District of New Mexico charging Diaz with the possession
    of over 1,000 kilograms of marijuana with intent to distribute in violation of 21
    U.S.C. § 841(b)(1)(A). After a jury trial, Diaz was convicted and this timely
    appeal followed.
    II.
    A.    Motion to Suppress
    Prior to trial, Diaz filed a Motion to Suppress Evidence in which he
    requested that the district court suppress the evidence of the marijuana seized
    from his tractor-trailer. After holding an evidentiary hearing, the district court
    denied Diaz’s motion. The district court concluded that Officer Smid’s initial
    Level Two Inspection of Diaz’s tractor-trailer was constitutional under the
    regulatory search exception to the Fourth Amendment’s warrant requirement, see
    United States v. Gwathney, 
    465 F.3d 1133
    , 1138-40 (10th Cir. 2006) (holding that
    New Mexico’s inspection system is constitutional under the regulatory search
    exception insofar as it allows an officer to enter a trailer to inspect its cargo).
    The district court also concluded that the subsequent search performed by
    Officers Smid and Lucero was constitutional, offering three independent bases for
    this holding: (1) that during the course of his Level Two Inspection Officer Smid
    developed probable cause to believe that Diaz’s tractor-trailer contained
    9
    contraband; (2) that during the course of his Level Two Inspection Officer Smid
    developed reasonable suspicion to believe that Diaz’s tractor-trailer contained
    contraband; and (3) that Diaz voluntarily consented to the subsequent search.
    On appeal, Diaz does not challenge the district court’s conclusion regarding
    the constitutionality of Officer Smid’s Level Two Inspection, but does argue that
    the district court erred in upholding the subsequent search of the cab and trailer.
    We are free to affirm the district court’s decision on any grounds, see United
    States v. Dennison, 
    410 F.3d 1203
    , 1209 n.1 (10th Cir. 2005), and begin our
    review with the district court’s conclusion that Officer Smid had probable cause
    to conduct the challenged search.
    Probable cause under the automobile exception to the Fourth Amendment’s
    warrant requirement exists if, given the totality of the circumstances, there is a
    fair probability that the vehicle contains contraband or evidence. United States v.
    Vasquez-Castillo, 
    258 F.3d 1207
    , 1212 (10th Cir. 2001). We review the district
    court’s probable cause ruling de novo, United States v. Rosborough, 
    366 F.3d 1145
    , 1152 (10th Cir. 2004), viewing the evidence in the light most favorable to
    the government and accepting the factual findings of the district court unless they
    are clearly erroneous, see United States v. Grimmett, 
    439 F.3d 1263
    , 1268 (10th
    Cir. 2006).
    The district court relied on the following fifteen factual findings in
    concluding that Officer Smid had probable cause to conduct a further search after
    10
    he had completed his regulatory inspection:
    (1) the inconsistent weights suggested Diaz was carrying more load than
    was listed on the bill of lading; (2) Diaz’s log book showed
    considerable down time away from home which was odd for an
    independent trucker; (3) Diaz offered inconsistent stories regarding his
    illness and/or trip to Mexico; (4) Diaz was increasingly nervous from
    the initial permit process through the inspection; (5) Diaz’s explanation
    for why he scaled out was inconsistent with the use of legitimate
    shippers; (6) Diaz’s possession of four cell phones; (7) Diaz’s lack of
    a CB radio was suspicious; (8) Diaz’s claim that he sold the CB radio
    because he needed money was inconsistent with the fact that he had
    four cell phones to pay for; (9) the use of a lock and seal on the trailer
    was unusual given the weight and nature of the load; (10) the seal on
    the trailer was not unique to the shipper, even though Diaz claimed the
    shipper sealed the trailer; (11) the large amount of dust on the boxes
    was consistent with the use of a cover load; (12) the strong odor of air
    freshener was consistent with an attempt to mask the odor of drugs; (13)
    Diaz’s hesitation and nervous laughter when asked if he had marijuana
    in the truck indicated criminal activity; (14) Diaz told Smid he had
    $1,500 in cash in a bag in the tractor; and (15) the packages in the
    trailer contained seat cushions in terrible condition, indicating they
    were part of a cover load.
    Aplt. App. at 297-98, 302.
    Diaz contends that several of these factual findings are clearly erroneous
    because they “were based on nothing more than Officer Smid’s bare assertions
    which lacked any factual basis.” Aplt. Op. Br. at 24. Specifically, Diaz argues
    that there was no evidence to confirm any alleged weight discrepancy Smid found
    between the bill of lading and the tractor-trailer itself, that his logbook
    demonstrated that his statements regarding his downtime were not inconsistent,
    that there was no documented evidence of dust on boxes or air fresheners in the
    trailer, and that Officer Halona’s testimony indicated that Diaz was calm, not
    11
    nervous, throughout the encounter. Diaz further argues that it was improper for
    the district court to rely solely on Officer Smid’s testimony to conclude that the
    details of his method of operation—his four cell phones, the use of a
    commercially available seal, his lack of a CB radio, etc.—were consistent with
    the practices of a drug trafficker.
    Diaz’s arguments are not compelling. First, as we have previously noted,
    “[t]he credibility of witnesses, the weight to be given to evidence, and the
    reasonable inferences drawn from the evidence fall within the province of the
    district court,” 
    Rosborough, 366 F.3d at 1148
    (quoting United States v. Long,
    
    176 F.3d 1304
    , 1307 (10th Cir. 1999)), and Diaz provided no evidence or direct
    testimony to contradict Officer Smid at the suppression hearing. Moreover, we
    have cautioned that “a court should accord deference to an officer’s ability to
    distinguish between innocent and suspicious actions.” United States v. Gandara-
    Salinas, 
    327 F.3d 1127
    , 1130 (10th Cir. 2003). Therefore, we cannot conclude
    that the district court’s factual findings were clearly erroneous, even if they were
    based solely on the testimony of Officer Smid.
    Thus, although our review of the record causes us to conclude that the
    events which relate to the district court’s final two factual findings occurred after
    Officer Smid’s Level Two Inspection, we accept, and in turn rely upon the
    remaining findings to conclude that by the end of his Level Two Inspection,
    Officer Smid had probable cause to believe that Diaz’s tractor-trailer contained
    12
    contraband. See 
    Gwathney, 465 F.3d at 1137-40
    (holding that a trucker’s
    suspicious travel schedule, the presence of non-conforming packages in his
    trailer, a receipt indicating he had paid almost $14,000 in cash for repairs, and
    footprints on boxes indicating that the non-conforming packages had been placed
    in the trailer last, all contributed to a finding of probable cause); United States v.
    Anderson, 
    114 F.3d 1059
    , 1066 (10th Cir. 1997) (holding that conflicting versions
    of travel itinerary, the presence of a communication device consistent with drug
    trafficking and the scent of air freshener all contributed to a finding of probable
    cause). In light of this conclusion we need not address the district court’s
    alternative findings and conclusions which support its conclusion that reasonable
    suspicion and consent would also serve as bases for upholding the challenged
    search. We conclude that the district court was correct in denying Diaz’s motion
    to suppress.
    B.    Sufficiency of the Evidence
    Diaz next argues that the evidence presented at his trial was insufficient to
    support his conviction. We review the sufficiency of the evidence to support a
    criminal conviction de novo. United States v. Triana, 
    477 F.3d 1189
    , 1194 (10th
    Cir. 2007). In so doing, we “ask only whether, taking the evidence—both direct
    and circumstantial, together with the reasonable inferences to be drawn
    therefrom—in the light most favorable to the government, a reasonable jury could
    find the defendant guilty beyond a reasonable doubt.” 
    Id. (citation and
    alteration
    13
    omitted).
    To support Diaz’s conviction for possession with intent to distribute, the
    government must prove beyond a reasonable doubt: (1) that Diaz knowingly
    possessed the marijuana; and (2) that Diaz possessed the marijuana with the
    specific intent to distribute it. 
    Id. Possession may,
    however, be constructive.
    That is, possession may be found if the defendant knowingly had ownership,
    dominion, or control over the contraband and the premises where it was found.
    United States v. Reece, 
    86 F.3d 994
    , 996 (10th Cir. 1996). However, “when the
    contraband may be attributed to more than one individual, constructive possession
    requires some nexus, link, or other connection between the defendant and the
    contraband.” 
    Id. According to
    Diaz, the marijuana in his trailer could reasonably be
    attributed either to him or to the Dollar Store and because there was no nexus or
    link which connected him to the contraband, the evidence was insufficient to
    support his conviction based on constructive possession. Even we assume,
    arguendo, that the marijuana found in the trailer could reasonably be attributed to
    the Dollar Store, Diaz’s argument is unavailing because the evidence adduced at
    trial did establish a nexus or link between Diaz and the contraband.
    Specifically, Diaz was the sole occupant of the truck, his mode of operation
    and his downtime in California supported an inference of drug trafficking, his
    computer was shown to be capable of creating bills of lading identical to the one
    14
    he presented to Officer Smid, he had a receipt for shrinkwrap which was used to
    package the marijuana, and the value of the drugs made it unlikely that they
    would be shipped without the driver’s knowledge. In sum, the evidence was
    sufficient to support’s Diaz’s conviction based on a theory of constructive
    possession.
    C.      Jury Instruction
    Diaz next argues that the district court erred in giving the jury the
    following instruction:
    With respect to the question of whether or not a defendant knew that the
    controlled substance was present, you may, but are not required to, infer
    that the driver and sole occupant of a tractor trailer rig has knowledge
    of the controlled substance within it. This inference does not relieve
    the government of its obligation to prove all the elements of the offense
    beyond a reasonable doubt.
    Aplt. App. at 674. Diaz alleges that this permissive inference instruction was not
    warranted by the evidence and as such it relieved the government of its burden to
    prove every element of the crime beyond a reasonable doubt. We review the trial
    court’s decision to give a particular jury instruction for an abuse of discretion, but
    “consider the instructions as a whole de novo to determine whether they
    accurately informed the jury as to the governing law.” 
    Gwathney, 465 F.3d at 1142
    .
    The instruction that Diaz challenges is the same instruction the defendant
    challenged in Gwathney. See 
    id. at 1138.
    In rejecting Gwathney’s challenge to
    15
    the instruction, we noted that “[a] permissive inference instruction does not
    violate a defendant’s Sixth Amendment rights provided there is a rational
    connection between the facts proved by the prosecution and the ultimate fact
    presumed, and the inferred fact is more likely than not to flow from the proven
    facts.” 
    Id. at 1143.
    We went on to hold that the district court had not abused its
    discretion in giving the permissible inference instruction because the evidence
    strongly supported an inference that Gwathney knew of the marijuana in his
    trailer. 
    Id. Specifically, Gwathney
    was the sole operator of the trailer containing
    the drugs, the load had not been sealed by the packers which meant Gwathney
    could have accessed it, and the high value of the marijuana made it unlikely that
    it would be shipped without the driver’s knowledge. 
    Id. Diaz distinguishes
    the facts of his case from those presented in Gwathney,
    pointing out that he did not own the trailer he was transporting, he was operating
    pursuant to a “hook and drop” arrangement, and the trailer he was transporting
    was locked and sealed by the shipper. Diaz claims that these factual differences
    precluded any inference that he had knowledge of the trailer’s contents. Even
    assuming, arguendo, that the facts that Diaz relies on are meaningfully
    distinguishable from Gwathney, his argument is nonetheless unavailing because
    there remains a host of evidence to support the inference that Diaz knew about the
    drugs in his trailer. This evidence includes Diaz’s sole operation of the truck, the
    high value of the drugs, the box of seals in the tractor which were of the same
    16
    make as the seal on the trailer, the bills of lading presented which were the same
    as those Diaz’s computer could generate, the receipt for shrinkwrap in the tractor
    and the various other suspicious details of Diaz’s mode of operation. Given the
    magnitude of this remaining evidence, the district court did not abuse its
    discretion in giving the jury the permissive inference instruction.
    D.    Expert Testimony
    Diaz next contends that the district court erred in allowing Officer Smid
    and Agent Garver to testify as expert witnesses regarding the trucking industry
    and/or common drug trafficking practices. Specifically, Diaz alleges that the
    district court erred in allowing Smid and Garver to offer expert testimony without
    first ensuring that there was a reliable basis for their expertise.
    Before trial, Diaz’s counsel filed a motion in limine on these grounds, but
    the district court chose to wait until the testimony was offered and objected to
    before making its ruling. During the course of the trial, however, Diaz’s counsel
    objected on these grounds only once toward the end of Officer Smid’s re-direct
    testimony and the district court correctly overruled Diaz’s objection, noting that
    the challenged testimony was not expert in nature. Thus, because any objections
    Diaz made were untimely, he has waived this issue and we will review the district
    court’s admission of this testimony only for plain error. See Macsenti v. Becker,
    
    237 F.3d 1223
    , 1230-34 (10th Cir. 2001) (holding that objections made to expert
    testimony after it was given were untimely and therefore reviewing the admission
    17
    of the testimony only for plain error); United States v. Nichols, 
    169 F.3d 1255
    ,
    1264 (10th Cir. 1999) (noting that unless the trial court rules upon a pretrial
    motion in limine without equivocation, the motion will not preserve an objection
    that is not renewed at the time the evidence is introduced).
    Federal Rule of Evidence 702 requires trial courts to assess the reliability
    of expert testimony which is based on scientific, technical, or “other specialized”
    knowledge before admitting it. Daubert v. Merrell Dow Pharm., Inc., 
    509 U.S. 579
    , 589 (1993); see also Kumho Tire Co., Ltd. v. Carmichael, 
    526 U.S. 137
    , 141
    (1999). Thus, if expert testimony is objected to at trial “the district court is
    required to make specific, on-the-record findings that the testimony is reliable
    under Daubert.” United States v. Roach, 
    582 F.3d 1192
    , 1207 (10th Cir. 2009).
    Much of the testimony of Officer Smid and Agent Garver was not,
    however, expert in nature because it was not based upon scientific, technical, or
    “other specialized” knowledge. Moreover, to the extent that either of the
    individuals’ testimony was expert in nature, not only did the absence of an
    objection excuse the district court from its duty to make “explicit on-the-record
    rulings” regarding reliability, see Goebel v. Denver and Rio Grande W. R.R. Co.,
    
    215 F.3d 1083
    , 1088 n.2 (10th Cir. 2000) (“When no objection is raised [to expert
    testimony], district courts are not required to make ‘explicit on-the-record rulings
    . . . .’”), but the testimony’s reliability can also be safely inferred from the
    18
    breadth of each individuals’ training and experience. 1 In sum, the district court
    did not err in allowing the testimony of either Officer Smid or Agent Garver.
    E.    Evidentiary Errors
    Diaz also argues that the district court denied him his constitutional right to
    present a defense when it refused to allow his handwriting expert to examine the
    original consent form, refused to permit the telephonic testimony of his former
    employer and excluded evidence that Diaz lacked a motive to commit the crime
    for which he was charged. We review the district court’s decision to exclude
    evidence for an abuse of discretion, but review de novo the question of whether a
    constitutional violation has occurred. United States v. Solomon, 
    399 F.3d 1231
    ,
    1239 (10th Cir. 2005).
    A defendant is afforded the constitutional right to present a defense by the
    due process clauses of both the Fifth and Fourteenth Amendments and by the
    Sixth Amendment’s right to compulsory process. 
    Id. This right
    is, however, not
    without limits and thus, in presenting evidence a defendant “must comply with the
    established rules of evidence and procedure to assure both fairness and reliability
    in the ascertainment of guilt or innocence.” 
    Id. (citation and
    alteration omitted).
    1
    Officer Smid testified that he has possessed a commercial driver’s license
    since 1994, he is a certified motor carrier inspector who has attended a two-week
    training course on conducting inspections, and he has conducted approximately
    2,500 commercial vehicle inspections, approximately fifty of which had resulted
    in the seizure of contraband. Agent Garver testified that in his seventeen years as
    a DEA special agent he has been involved in several hundred drug investigations
    during which he has learned about various drug trafficking practices.
    19
    “While the trial court may not apply a rule of evidence mechanistically to defeat
    the ends of justice,” in order to demonstrate that his constitutional rights have
    been violated a defendant “must show that the exclusion of evidence rendered his
    trial fundamentally unfair . . . .” 
    Id. (quotations omitted).
    1.     Handwriting Expert
    Shortly before trial, Diaz filed a Motion to Inspect the Consent to Search
    Form in which he requested that the district court direct the government to allow
    a handwriting expert to inspect the original consent form at his offices in nearby
    Santa Fe, New Mexico. The district court did not hold an evidentiary hearing on
    the matter, but denied Diaz’s motion in a written order in which it noted that the
    government had already complied with Federal Rule of Criminal Procedure
    16(a)(1)(E) by allowing Diaz to inspect and copy the original consent form and
    found that denying access to the original form was not prejudicial to Diaz. Diaz
    now claims that the district court abused its discretion both in its decision on the
    merits and in issuing its order without first holding an evidentiary hearing.
    Diaz’s argument is unavailing. Not only did Diaz fail to request an
    evidentiary hearing in his motion, but he has also subsequently failed to identify
    what additional evidence would have been presented at such a hearing that was
    not already set forth in his motion. Further, Rule 16(a)(1)(E) makes no mention
    of a defendant’s right to take custody of a document, but instead requires only
    that the government permit the defendant “to inspect and to copy” documents, a
    20
    step that the government in this case had already taken. Fed. R. Crim. P.
    16(a)(1)(E). Thus, the district court did not abuse its discretion in denying Diaz’s
    motion or in doing so without first holding an evidentiary hearing.
    2.      Telephonic Testimony
    Less than a week before his trial commenced, Diaz filed a motion
    requesting that the district court permit his former employer to testify
    telephonically regarding the common practices of the trucking industry. The
    district court denied this motion in a written order referencing the reasons set
    forth at a hearing on the motion, namely that Federal Rule of Criminal Procedure
    26 requires all witnesses in a criminal trial to testify in open court unless
    otherwise provided by statute or by rule. On appeal, Diaz contends that the
    district court erred in issuing its order both because it failed to acknowledge its
    discretion to permit telephonic testimony, and because it failed to exercise that
    discretion.
    Diaz’s argument is without merit. The language of Rule 26 unequivocally
    states that all witnesses in a criminal trial must testify in open court unless
    otherwise provided by statute or by rules adopted under 28 U.S.C. §§ 2072-2077.
    See Fed. R. Crim. P. 26. Diaz has failed to point to any statute or rule which
    provides such an exception which would apply in this case. Thus, the district
    court did not abuse its discretion in declining to conclude that it had discretion to
    permit telephonic testimony, and/or in declining to exercise such discretion.
    21
    3.     Motive Testimony
    In his case-in-chief, Diaz attempted to present the testimony of Genaro
    Legorreta, an attorney who at the time was representing Diaz in a California
    worker’s compensation proceeding. Diaz hoped that evidence of his possible
    worker’s compensation recovery would establish that he did not have a financial
    motive to traffic in marijuana. As Legorreta began to explain his representation
    of Diaz, however, the district court cut off the testimony, ruling that it was
    irrelevant. Diaz contends that the district court abused its discretion in excluding
    Legorreta’s testimony because he claims that the absence of any plausible motive
    for his engaging in criminal conduct is highly relevant.
    Once again, Diaz’s argument is unpersuasive. Even if we accept Diaz’s
    proposition that absence of a financial motive is relevant, given the potential jury
    confusion that an in-depth discussion of a worker’s compensation proceeding
    might cause, the district court had an adequate basis for excluding Legorreta’s
    testimony under Federal Rule of Evidence 403. In fact, the district court
    mentioned that it believed that if the testimony were allowed, “[t]he jury [was]
    going to think this is a civil case.” Aplt. App. at 585. As “we are required to
    give the trial court ‘substantial deference’ in Rule 403 rulings,” United States v.
    Shumway, 
    112 F.3d 1413
    , 1422 (10th Cir. 1997) (quotation and citation omitted),
    we conclude that the district court did not abuse its discretion in excluding
    Legorreta’s testimony.
    22
    4.     Cumulation
    Finally, Diaz contends that even if each of the district court’s evidentiary
    rulings were only harmless error, viewed cumulatively they infringed upon his
    constitutional right to present a defense. Diaz’s argument fails because, as the
    foregoing discussion demonstrates, the district court did not err in any of its
    evidentiary rulings.
    III.
    For the reasons discussed above, we AFFIRM Diaz’s conviction under 21
    U.S.C. § 841(b)(1)(A).
    Entered for the Court
    Mary Beck Briscoe
    Circuit Judge
    23