The opinion
UNITED STATES DISTRICT COURT
EASTERN DISTRICT OF LOUISIANA
SHARON B. IKERD CIVIL ACTION
VERSUS No. 23-890
c/w 23-1330
REF: 23-890
BERKSHIRE HATHAWAY HOMESTATE SECTION I
INSURANCE COMPANY ET AL.
ORDER AND REASONS
Before the Court is a motion1 to exclude the expert opinion of Dr. Jonathan
Thompson (“Thompson”) filed by defendants Bobby Dillon (“Dillon”), L Dillon Tree
Harvesting, LLC, and Berkshire Hathaway Homestate Insurance Company
(collectively, “defendants”). Plaintiff Sharon B. Ikerd (“plaintiff”) opposes the motion.2
Defendants filed a reply to plaintiff’s opposition.3 Defendants also filed a motion
seeking to strike plaintiff’s response as it was filed one day late pursuant to Local
Rule 7.5.4 For the reasons set forth below, the Court denies both motions.
I. BACKGROUND
The present action concerns an automobile collision. At the time of the
accident, plaintiff was driving a school bus and had stopped to allow children to exit
1 R. Doc. No. 40.
2 R. Doc. No. 55.
3 R. Doc. No. 72.
4 R. Doc. No. 68. Pursuant to Local Rule 7.5, plaintiff’s deadline to respond to
defendants’ motion was November 28, 2023. Plaintiff did not file a response and the
time for doing so has passed.
the bus.5 Plaintiff alleges that Dillon who was driving a tractor trailer carrying a load
of logs hit her school bus.6
In her complaint, plaintiff complains of “severe, painful, debilitating, and
permanently disabling injuries[,]” as well as “severe physical pain and suffering” and
“mental anguish” caused by the accident.7 She alleges that her damages were caused
by “the gross and wanton negligence, carelessness, and recklessness” of Dillon.8
Plaintiff seeks damages for: “[p]ast, present, and future pain and suffering;” “[p]ast,
present, and future mental anguish;” “[p]ast, present, and future medical expenses;”
“[p]ast, present, and future loss of enjoyment of life;” “[p]ast, present, and future lost
wages;” “[p]ermanent disability;” “[p]roperty damage;” and “[o]ther damages itemized
at the trial of this matter.”9
In their motion, defendants seek to exclude Thompson’s opinion that the large
gap in plaintiff’s 4/5 facet joints is “likely from instability from the impact.”10
Defendants argue that the opinion should be excluded for three reasons:
(1) the opinion is predicated on concepts of accident mechanics, severity
of force and expected injuries, all of which are concepts of biomechanical
engineering that are outside the scope of his expertise as a pain
interventionist; (2) Dr. Thompson employed no methodology, other than
relying upon his personal experience as a pain interventionist, in
opining that the May 16, 2022 motor vehicle accident likely caused the
large gap in plaintiffs 4/5 facets, as he did nothing to test or verify that
proposition and instead relied upon his understanding of principles of
accident mechanics and impact forces that are beyond the scope of his
qualified area of expertise; and (3) the opinion of Dr. Thompson will not
5 R. Doc. No. 1-1, at 12.
6 Id.
7 Id. at 13.
8 Id. at 12.
9 Id. at 13–14.
10 R. Doc. No. 40, at 1.
be relevant to assist the trier of fact because it lacks foundational
support and Dr. Thompson has provided no explanation as to [how] his
expertise in pain intervention supports his proposition that the “large
gap in the 4/5 facets, likely from instability from the impact.”11
In response, plaintiff argues that Thompson is the only expert who may testify
to medical causation, the differential diagnosis used by Thompson is well-established
as reliable, and Thompson’s testimony is relevant.12 Plaintiff also submits that any
“perceived deficiencies” in Thompson’s testimony go to the weight and credibility of
the testimony and are therefore not grounds for exclusion.13
II. STANDARDS OF LAW
a. Motion to Strike Plaintiff’s Response
“Late oppositions are evaluated under Federal Rule of Civil Procedure 6(b)’s
“excusable neglect” standard.” Michel v. Ford Motor Co., No. CV 18-4738, 2018 WL
10247013, at *1 (E.D. La. Dec. 27, 2018) (Vance, J.) (citing Vasudevan v. Adm'rs of
Tulane Educ. Fund, 706 F. App'x 147, 151 (5th Cir. 2017) and Adams v. Travelers
Indem. Co. of Conn., 465 F.3d 156, 161 (5th Cir. 2006)). “Courts consider the following
factors in evaluating excusable neglect: ‘the danger of prejudice to the [non-movant],
the length of the delay and its potential impact on the judicial proceedings, the reason
for the delay, including whether it was within the reasonable control of the movant,
and whether the movant acted in good faith.’” Id. (quoting Adams, 465 F.3d at 162
n.8).
11 Id. at 2.
12 R. Doc. No. 55, at 1.
13 Id.
b. Motion to Exclude Thompson’s Causation Opinion
Federal Rule of Evidence 702 governs the admissibility of expert testimony.
See Daubert v. Merrell Dow Pharms., Inc., 509 U.S. 579, 588 (1993); United States v.
Hitt, 473 F.3d 146, 148 (5th Cir. 2006). Rule 702 provides:
A witness who is qualified as an expert by knowledge, skill, experience,
training, or education may testify in the form of an opinion or otherwise if:
(a) the expert’s scientific, technical, or other specialized knowledge will
help the trier of fact to understand the evidence or to determine a fact
in issue;
(b) the testimony is based on sufficient facts or data;
(c) the testimony is the product of reliable principles and methods; and
(d) the expert has reliably applied the principles and methods to the facts
of the case.
“To qualify as an expert, the witness must have such knowledge or experience in [his]
field or calling as to make it appear that his opinion or inference will probably aid the
trier in his search for truth.” United States v. Hicks, 389 F.3d 514, 524 (5th Cir. 2004)
(quotations omitted).
The U.S. Supreme Court’s decision in Daubert “provides the analytical
framework for determining whether expert testimony is admissible under Rule 702.”
Pipitone v. Biomatrix, Inc., 288 F.3d 239, 243 (5th Cir. 2002). The Daubert framework
requires trial courts to make a preliminary assessment to “determine whether the
expert testimony is both reliable and relevant.” Burleson v. Tex. Dep’t of Crim. Just.,
393 F.3d 577, 584 (5th Cir. 2004).
A number of nonexclusive factors may be relevant to the reliability inquiry,
including: (1) whether the technique has been tested, (2) whether the technique has
been subjected to peer review and publication, (3) the potential error rate, (4) the
existence and maintenance of standards controlling the technique’s operation, and
(5) whether the technique is generally accepted in the relevant scientific community.
Burleson, 393 F.3d at 584. The reliability inquiry must remain flexible, however, as
“not every Daubert factor will be applicable in every situation; and a court has
discretion to consider other factors it deems relevant.” Guy v. Crown Equip. Corp.,
394 F.3d 320, 325 (5th Cir. 2004). “Both the determination of reliability itself and the
factors taken into account are left to the discretion of the district court consistent
with its gatekeeping function under [Rule] 702.” Munoz v. Orr, 200 F.3d 291, 301 (5th
Cir. 2000).
As a general rule, “[q]uestions relating to the bases and sources of an expert’s
opinions affecting the weight to be assigned that opinion rather than its admissibility
should be left for the jury’s consideration.” Smith v. Starr Indem. & Liab. Co., 807 F.
App'x 299, 302 (5th Cir. 2020) (citing Viterbo v. Dow Chem. Co., 826 F.2d 420, 422
(5th Cir. 1987)). “Vigorous cross-examination, presentation of contrary evidence, and
careful instruction on the burden of proof are the traditional and appropriate means
of attacking shaky but admissible evidence.” Daubert, 509 U.S. at 596.
With respect to determining the relevance of an expert’s testimony pursuant
to Rule 702 and Daubert, the proposed testimony must be relevant “not simply in the
way all testimony must be relevant [pursuant to Rule 402], but also in the sense that
the expert’s proposed opinion would assist the trier of fact to understand or determine
a fact in issue.” Bocanegra v. Vicmar Servs., Inc., 320 F.3d 581, 584 (5th Cir. 2003).
When ruling on the admissibility of expert opinion evidence, “[t]he district court
should, initially, approach its inquiry with the proper deference to the jury's role as
the arbiter of disputes between conflicting opinions.” Viterbo, 826 F.2d at 422.
“[W]hen expert testimony is challenged under Rule 702 and Daubert, the
burden of proof rests with the party seeking to present the testimony.” Kennedy v.
Magnolia Marine Transp. Co., 189 F. Supp. 3d 610, 615 (E.D. La. 2016) (Africk, J.)
(citing Moore v. Ashland Chemical, Inc., 151 F.3d 269, 276 (5th Cir.1998)).
III. ANALYSIS
a. Motion to Strike Plaintiff’s Response
The Court will first address defendants’ motion to strike plaintiff’s response
because it was filed one day late. As in Michel, “plaintiffs filed their responses only
one day late, and proceedings were not delayed.” No. CV 18-4738, 2018 WL 10247013,
at *1. Additionally, “[b]ecause defendants timely filed their repl[y] and did not
request a one-day continuance of their deadline, they do not appear to have been
prejudiced.” See id. While plaintiff has not explained her failure to timely respond,
there is no evidence of bad faith, and the untimely response has not delayed the
proceedings. Therefore, the Court will deny defendants’ motion to strike plaintiff’s
response.
b. Motion to Exclude Thompson’s Causation Opinion
As explained, defendants raise three objections to the admissibility of
Thompson’s opinion testimony. The Court will address each objection in turn.
First, defendants assert that Thompson’s theory of causation rests on “the
severity of forces, mechanics of impact, and anticipated movement of plaintiff’s body
based on such impact forces and mechanics.”14 Defendants argue that because
Thompson is not an expert in biomechanical engineering, he cannot testify to such
concepts.15 In response, plaintiff argues that Thompson is testifying as to medical
causation, which he is uniquely qualified to do as plaintiff’s treating physician.16
A biomechanical engineer may testify as to “the amount of force he believes
was generated by the [subject collision] and the observed effect of such force on
a hypothetical human body in a comparable accident.” Collins v. Benton, No. CV 18-
7465, 2020 WL 3605942, at *6 (E.D. La. July 2, 2020) (Brown, J.) (emphasis in
original) (quoting Thomas v. Chambers, No. CV 18-4373, 2019 WL 1670745, at *4
(E.D. La. Apr. 17, 2019) (Vance, J.)). Unlike biomechanical engineers, “medical
doctors are qualified[—]indeed, uniquely qualified[—]to offer opinions as to medical
causation.” Layssard v. United States, No. CIV.A. 06-0352, 2007 WL 4144936, at *3
(W.D. La. Nov. 20, 2007).
Defendants argue that Thompson’s testimony “postulating [about] the type of
impact and mechanism of jarring forced [that] he believes were produced” in the
accident should be excluded because those statements require biomechanical
engineering expertise.17 Yet defendants do not cite to any deposition testimony,18
medical records, or other evidence that indicates Thompson intends to testify about
biomechanics.
14 R. Doc. No. 40-1, at 6.
15 Id.
16 R. Doc. No. 55, at 5.
17 R. Doc. No. 72, at 2.
18 Defendants note in their reply that they have not deposed Thompson. Id. at 1.
Defendants rely solely on Thompson’s statement that the large gap in
plaintiff’s 4/5 facets was “likely from instability from the impact.” However, this
statement does not involve expert testimony about the mechanics and severity of
force generated in a collision. As plaintiff’s treating physician, Thompson may testify
about plaintiff’s injury, including the alleged cause, based on his experience as a
medical doctor. See Thomas v. G & K Servs. Co., No. CIV.A. 01-1637, 2002 WL
34720493, at *1 (E.D. La. Aug. 16, 2002) (Lemmon, J.) (holding that a treating
physician could testify, without investigating the fall but based on his experience and
the patient’s allegedly limited and misleading self-reported history, that a fall caused
the plaintiff’s injury). Defendants “may cross-examine [Thompson] concerning the
basis of his opinion, and the jury is free to evaluate its probative value.” Id.19
Second, defendants argue that Thompson does not rely upon generally
accepted or otherwise reliable methodology.20 Specifically, defendants argue that
Thompson did not review any records concerning the vehicular accident and that
Thompson does not cite facts or data on which he bases his opinion.21 In response,
plaintiff argues that differential diagnosis is a reliable means for a medical doctor to
determine causation.22
19 While their motion seeks to exclude Thompson’s causation opinion entirely, in
reply, defendants state they wish to preclude Thompson only from postulating about
the type of impact and jarring forces he believes were produced. R. Doc. No. 72, at 2.
There is no indication that Thompson intends to testify about biomechanics. If
Thompson’s testimony exceeds his medical expertise, the Court will evaluate any
objection as appropriate.
20 R. Doc. No. 40-1, at 7.
21 Id. at 8–9.
22 R. Doc. No. 55, at 8–9.
As noted by plaintiff,23 the U.S. Fifth Circuit Court of Appeals has explained
that “[a] reliable differential diagnosis typically, though not invariably, is performed
after ‘physical examinations, the taking of medical histories, and the review of clinical
tests, including laboratory tests,’ and generally is accomplished by determining the
possible causes for the patient's symptoms and then eliminating each of these
potential causes until reaching one that cannot be ruled out or determining which of
those that cannot be excluded is the most likely.” Johnson v. Arkema, Inc., 685 F.3d
452, 468 (5th Cir. 2012) (quoting Westberry v. Gislaved Gummi AB, 178 F.3d 257, 262
(4th Cir.1999)). Plaintiff states that “[t]hese are the exact steps” that Thompson
utilized to reach his conclusion.24 Defendants do not quote any testimony or cite to
any medical records that contradict plaintiff’s contention that the differential
diagnosis employed by Thompson is reliable.
As mentioned previously, “[q]uestions relating to the bases and sources of an
expert’s opinions affecting the weight to be assigned that opinion rather than its
admissibility should be left for the jury’s consideration.” Smith, 807 F. App'x at 302
(citing Viterbo, 826 F.2d at 422). “Further, a doctor's expert testimony ‘should not [be]
excluded under Daubert solely on the ground that his causation diagnosis was based
only on his patient’s self-reported history.’” Tripkovich v. Ramirez, No. CIV.A. 13-
6389, 2015 WL 3849392, at *3 (E.D. La. June 22, 2015) (Fallon, J.) (Cooper v. Carl A.
Nelson & Co., 211 F.3d 1008, 1021 (7th Cir.2000)); see also Thomas, 2002 WL
34720493, at *1 (permitting a treating physician to testify to medical causation based
23 Id. at 9.
24 Id. at 10.
on his medical experience and the patient’s allegedly limited and misleading self-
reported history). Accordingly, defendants’ concern about the reliability of
Thompson’s testimony should be raised through cross-examination and the
presentation of contrary evidence. See Daubert, 509 U.S. at 596.
Third, defendants argue that Thompson’s opinion lacks fundamental support
and is therefore not helpful to the jury.25 Additionally, defendants argue that
Thompson’s opinion is contradicted by the lumbar X-rays that he ordered.26 In
response, plaintiff argues that “Thompson’s use of a physical examination, taking of
patient history, and review of diagnostic imaging is a sufficient foundation for his
opinion as to medical causation.”27
Defendants’ third objection goes directly to the bases and sources of
Thompson’s opinion. Accordingly, this objection should be addressed through cross-
examination and the presentation of contrary evidence. See Daubert, 509 U.S. at 596.
III. CONCLUSION
Accordingly,
IT IS ORDERED that defendants’ motion to exclude the causation opinion of
Thompson is DENIED.
IT IS FURTHER ORDERED that defendants’ motion to strike plaintiff’s
response to their motion is DENIED.
25 R. Doc. No. 41, at 9–11.
26 Id. at 11.
27 R. Doc. No. 55, at 13.
New Orleans, Louisiana, November 30, 2023.
var M. AFRICK
UNITED S'KATES DISTRICT JUDGE
11