Opinion by
€ 1 In this negligence action, plaintiff, Michael Leaf, appeals the district court's judgment entered on a jury verdict in favor of defendant, Peter Beihoffer. We affirm.
2 One of the issues Mr. Leaf presents for review is one of first impression in Colorado: whether evidence of a witness's failure to file income tax returns for several years is probative of the witness's character for truthfulness and therefore admissible under CRE 608(b) to impeach the witness's credibility. We hold that it is. Accordingly, we reject Mr. Leafs challenge to the district court's ruling allowing such evidence.
I. Background
T8 .Mr. Beihoffer's car rear-ended Mr. Leaf's taxicab on February 26, 2010, on an iey road. A police officer estimated that Mr. Beihoffer's car was traveling at fifteen miles per hour when it struck Mr. Leafs stopped car. The only property damage resulting from the crash was paint transfer on the bumpers of the two vehicles.
14 Officer John Smyly testified that Mr. Beihoffer was unsteady after the accident and smelled of marijuana. Mr.. Beihoffer failed roadside sobriety tests, admitted that he had taken two Xanax tablets before driving, and subsequently tested positive for marijuana. Police found six Xanax tablets in Mr. Beihoffer's pocket and marijuana in the vehicle. "I believe he was impaired," Officer Smyly testified. Mr. Beiboffer ultimately pleaded guilty to a misdemeanor charge of driving under the influence of drugs (DUI), in violation of section 42-4-1801(1)(a), C.R.S. 2018.
[ 5 Mr. Leaf did not complain of injuries at the scene. However, he sought emergency room treatment for pain nine days after the accident and began treatment with a chiropractor two months after the accident.
T6 Mr. Leaf sued Mr. Beihoffer for negligence, alleging that the collision had caused him permanent spinal injuries.
T7 A jury found that (1) Mr. Beihoffer had not been negligent; (2) Mr. Leaf had not suffered any injuries or damages; and (8) there was no causal connection between the alleged negligence and the claimed injuries. Accordingly, the court entered judgment in Mr. Beihoffer's favor.
II. Discussion
T8 Mr. Leaf contends that the district court erred by (1) not giving preclusive effect to Mr. DUI guilty plea and by excluding evidence that Mr. Beihoffer had pleaded guilty to DUI; (2) rejecting his proposed jury instruction defining DUI; (8) excluding medical evidence he provided to Mr. Beihoffer after the court's cut-off date for discovery; and (4) allowing impeachment evidence that he had failed to file income tax returns for several years. We discern no reason to reverse.
A. Standard of Review
19 We review a district court's evi-dentiary rulings for an abuse of discretion. Wal-Mart Stores, Inc. v. Crossgrove,
111 Mr. Leaf preserved the issues he raises on appeal. So if we determine that the court erred in admitting or excluding evidence or in refusing to give the jury the particular instruction at issue, we must reverse the judgment unless we determine that any such error was harmless. An error was harmless if it did not affect a party's substantial rights. C.R.C.P. 61; see CRE 103(a). "An error affects a substantial right only if 'it can be said with fair assurance that the error substantially influenced the outcome of the case or impaired the basic fairness of the trial itself?" Bly v. Story,
B. Analysis
112 To prevail on a negligence claim, the plaintiff must prove (1) the existence of a legal duty of the defendant to the plaintiff; (2) breach of that duty; (8) injury and damages to the plaintiff; and (4) a sufficient causal connection between the defendant's breach and the plaintiff's damages. E.g., HealthONE v. Rodrigues ex rel. Rodrigues,
13 In this case, the jury returned a special verdict form, finding against Mr. Leaf on the elements of breach of duty, damages, and causation. (Mr. Beihoffer did not deny that he owed a legal duty to. Mr. Leaf to be reasonably careful.) Thus, unless Mr. Leaf can show error relating to all three of those elements, reversal is not warranted.
114 Mr. Leafs first two contentions of error-the exclusion of Mr. Beihoffer's guilty plea to DUI, and the rejection of Mr. Leaf's proposed jury instruction on DUI-relate only to the element of breach of duty.
1. The Tax Return Evidence Was Admissible
115 Mr. Leaf contends that the district court committed reversible error by allowing impeachment evidence that he had failed to file income tax returns for several years, because that evidence was not proba
a. Procedural Facts
T16 Mr. Leaf had not filed income tax returns for several years, though legally required to do so.
T17 During a conference in the midst of trial, outside the jury's presence, the parties' attorneys again argued the issue. The court ruled that Mr. Leaf's truthfulness regarding his injuries and the cause thereof was relevant, and that a failure to file tax returns was a form of dishonesty. The court further ruled that, assuming Mr. Leafs truthfulness became an issue during his direct testimony, it would allow evidence that Mr. Leaf had failed to file tax returns to impeach his eredi-bility during eross-examination.
118 Mr. Beihoffer's counsel asked Mr. Leaf on cross-examination whether he had filed tax returns since 2006. Mr. Leaf said that he had not, and admitted that he had been legally required to do so.
19 Mr. Beihoffer's counsel argued during closing that Mr. Leaf's failure to file tax returns and pay taxes undermined his credibility and "indicates that he is willing to do what is necessary for his own financial gain."
b. Applicable Law
120 CRE 608(b) gives the district court discretion to admit evidence of prior conduct that is offered to impeach a witness's eredi-bility. See People v. Segovia,
[21 In Segovia, the supreme court recognized the divergence among jurisdictions between a broad view that any bad conduct is probative of truthfulness and a narrow view that only deceptive conduct is probative of truthfulness. Id. at 1131-82. The court adopted a middle course. In finding shoplift ing to be probative of truthfulness, the court endorsed a fluid approach that relies on "common experience" to recognize dishonest behavior. Id. at 1182.
122 But there is no Colorado appellate decision addressing directly whether a witness's failure to file tax returns for multiple years bears on the witness's character for truthfuiness. Two cases have touched on the issue.
1 23 In Kraemer, the prosecutor asked the defendant about his failure to file a state income tax return for one year. On appeal, the defendant argued that the questions were improper under CRE 404(b), which pertains to the introduction of evidence of other crimes, wrongs, or acts. The division held that because the evidence was offered to impeach the defendant's credibility, its admissibility was governed by CRE 608(b), not CRE 404(b). Analyzing the issue under CRE 608(b), the division appears to have concluded (or at least assumed without deciding) that a single failure to file, by itself, was not evidence of intentional wrongdoing, and therefore not admissible under CRE 608(b). Kraemer,
4 24 In Segovia, in the course of discussing the admissibility of the defendant's prior shoplifting incident, the supreme court ob
125 Many federal courts have addressed this issue. In the main, they hold that a witness's failure to file tax returns for several years may indicate intentional wrongdoing, is therefore probative of the witness's character for truthfulness, and, thus, is admissible under Fed.R.Evid. 608(b). See, eg., United States v. Fairchild,
126 The few state courts to have addressed the issue under evidentiary rules similar to CRE 608(b) and Fed.R.Evid. 608(b) are divided. Compare Capul v. Fleet Bank of Maine,
127 Determining the admissibility of such evidence under CRE 608(b), however, does not end the matter. Evidence relevant under CRE 608(b) is subject to the balancing test of CRE 403. See Segovia,
1 28 On review, we 'must afford the evidence the maximum probative value attributable by a reasonable fact finder and the minimum unfair prejudice to be reasonably expected' from the evidence." Kelly v. Haralampopoulos by Haralampopoulos,
c. Application
129 Evidence indicated that Mr. Leafs failure to file tax returns was intentional. Mr. Leaf failed to file returns for four years. And during cross-examination, Mr. Leaf admitted that he had been legally obligated to pay taxes for those years.
130 We also conclude that the district court did not abuse its discretion in ruling that the probative value of the evidence was not outweighed by the danger of unfair prejudice. Mr. Leaf argues that the evidence had no probative value. However, his failure to file tax returns for several years was probative of his credibility, which, in turn, affected the weight of 'his testimony on the issues of negligence, damages, and causation. As Mr. Leaf points out in his opening brief, the "decisive issue before the jury was one of credibility."
[31 Nor are we persuaded that the tax return evidence was unfairly prejudicial. Mr. Beibhoffer's counsel referred to the tax return evidence in the context of discussing Mr. Leafs credibility, saying that Mr. Leaf might be prone to lying for financial gain. That was fair comment.
1 32 Although the tax return evidence may have damaged Mr. Leafs case, we do not perceive the evidence as having had an undue tendency to incite the jury to rule against him on an improper basis. See Kelly, T 47 (district court could reasonably conclude that "intensely prejudicial" evidence was not unfairly prejudicial); Koekn,
1383 In sum, the district court did not abuse its discretion in allowing Mr. Beihof-fer's counsel to question Mr. Leaf about his failure to file tax returns, or in allowing Mr. Beihoffer's counsel to refer thereto in argument to the jury.
2. Mr. Leaf's Other Contentions of Error Also Fail
1 34 Because Mr. Leaf's only contention of error relating to the element of causation is unpersuasive, his remaining contentions of error are irrelevant. See Vanderpool, 131; Dunlap,
a. Mr. Beibhoffer's Guilty Plea to DUI
185 Mr. Leaf contends that the district court erred by not giving preclusive effect to Mr. Beihoffer's DUI guilty plea and by excluding evidence of the plea offered for impeachment. We reject these contentions.
T 36 Section 42-4-1713, C.R.S.2018, states in relevant part that "no record of the. convietion of any person for any violation of this article shall be admissible as evidence in any court in any civil action." Mr. Beihoffer's DUI offense was one arising under article 4 of title 42. Thus, evidence of Mr. Beihoffer's DUI guilty plea had no preclusive effect in this case. See Bullock v. Wayne,
$37 Nor did the district court reversibly err in excluding evidence of the guilty plea for impeachment.
138 We conclude that any error in excluding evidence of the DUI conviction was harmless in this ease, for two reasons. First, it was cumulative of other evidence presented, particularly the impeachment evidence from Mr. Beihoffer's deposition that contradicted his trial testimony. See Cherry Creek Sch. Dist, No. 5 v. Voelker ex rel. Voelker,
139 Second, whether Mr. Beihoffer had driven under the influence of drugs was not, in the end, seriously contested. Mr. Beihof-fer's counsel conceded in closing argument,
He shouldn't have been in the car, there's no question about it. He shouldn't have taken Xanax and driven, even though he thought that he was just going a couple of blocks and he would be fine, and he felt fine at the time of the accident. No excuse. No excuse, but this is not a criminal trial. Three years ago is when this accident occurred. Three years ago is when these issues about Mr. Beihoffer's mistakes and taking drugs that night, Xanax that night, were dealt with in-in a different courtroom in a different setting.
Thus, the jury did not receive a misleading account of events. See Banek,
1 40 Therefore, we conclude that exclusion of this cumulative evidence on an undisputed issue did not undermine the fairness of the trial or influence the outcome of the case. See Bly, 241 P.8d at 585. R
b. Jury Instruction Defining DUI
141 Mr. Leaf contends that the district court erred by rejecting his proposed jury instruction defining DUI. That instruetion articulated the statutory definition of DUI. Counsel argued that the instruction was appropriate under Instruction 11:14 of the Colorado Jury Instructions for civil cases, which, though titled "DRIVING UNDER THE INFLUENCE-DEFINED," actually includes no definition. CJI-Civ. 4th 11:14. We are not persuaded that Mr. Leaf's definitional instruction was appropriate under Instruction 11:14.
€42 The notes on use for this pattern instruction explain that a statutory DUI definition is to be given along with Instruction 9:14, if necessary. Instruction 9:14 expressly pertains only to a claim of negligence per se. Mr. Leaf did not pursue a negligence per se . claim. He pursued only a negligence claim, and does not contend that the district court gave incomplete or improper instructions for that claim. -
1 43 Thus, the district court did not abuse its discretion in rejecting Mr. Leafs proposed definitional instruction; the statutory definition of DUI was not helpful in determining the claim actually presented and would have only confused the jury as to the proper standard of care. See Bennett v. Greeley Gas Co.,
c. Medical Evidence
144 Mr. Leaf contends that the district court erred by excluding medical evidence that he had disclosed after the court's cut-off date for providing discovery. He argues that the MRI evidence he wished to introduce (a somewhat novel type of MRI that purportedly captured Mr. Leaf's movements) bolstered his claim of permanent injury.
145 The accident occurred on February 26, 2010; discovery closed on September 17,
46 However, less than one month before the reset trial date, Mr. Leaf attempted to supplement his discovery with the results of a motion MRI conducted on February 20, 2013 (three years after the accident). After considering Mr. Beihoffer's written motions, the district court excluded evidence of the motion MRI, reiterating that it had not extended the discovery deadline and had "frozen" the case on November 1, 2012.
€47 Contrary to Mr. Leafs argument, the duty of a party to supplement discovery under C.R.C.P. 26(e) does not obligate the court to rule that any new information is admissible. See City of Aurora ex rel. Util Enter. v. Colo. State Eng'r,
48 Mr. Leaf also argues that the sanction of exclusion was not justified under C.R.C.P. 37. It is not entirely clear that the court based its decision on that rule. But assuming that it did, we perceive no abuse of discretion.
49 C.R.C.P. 37(c)(1) provides that a party who fails to timely disclose evidence as required by C.R.C.P. 26(a) or (e) shall not be allowed to introduce that evidence at trial unless the failure to timely disclose was substantially justified or harmless to the opposing party. See Todd v. Bear Valley Vill. Apartments,
{50 The district court should consider a variety of factors in determining whether the late disclosing party has shown substantial justification or harmlessness, and it has considerable discretion with respect thereto. Id. Therefore, we will not reverse a district court's decision excluding evidence pursuant to C.R.C.P. 37(c)(1) unless the late disclosing party establishes an abuse of that discretion. See Berry v. Keltner,
51 We conclude that Mr. Leaf has failed to show that the late discovery was substantially justified or harmless. Mr. Leaf has failed to explain persuasively why the MRI could not have been conducted until three years after the accident occurred, and his explanation that the test was part of continuing treatment does not justify the delay. Nor are we persuaded that it would have been harmless to Mr. Beihoffer to allow introduction at trial of this new medical information. The MRI, which, as noted, was apparently of an unusual type, was disclosed one week before one of Mr. Leaf's medical experts was to give testimony for trial via videotaped deposition, and less than one month before trial. See Todd,
€52 Therefore, we conclude that the district court did not abuse its discretion in excluding the untimely disclosed medical evidence and using "active trial court management of civil cases in order to reduce abuses of the system such as dilatory discovery tactics and inefficient trial preparation." Id.; see Trattler v. Citron, 182 P.Bd 674, 680 (Colo.2008).
III. Conclusion
153 For the foregoing reasons, the judgment is affirmed.
Notes
. Mr. Leaf initially asserted claims for negligence and negligence per se, but ultimately decided not to pursue the negligence per se claim.
. Mr. Leaf argues in his reply brief that Mr. Beihoffer's guilty plea was probative of Mr. Bei-hoffer's credibility generally and, therefore, relevant to all elements of his claim. However, evidence of a misdemeanor conviction is not admissible to impeach the general credibility of a witness. People v. Silva,
. According to Mr. Beihoffer's offer of proof, Mr. Leaf was not required to file an income tax return for 2009, when he earned only $6207. Thus, the argument was that Mr. Leaf had failed to file tax returns for 2007, 2008, 2010, and 2011, because his income in each of those years exceeded the legal threshold above which a tax return must be filed.
. He also said he had recently hired someone to prepare tax returns for those years.
. We do not suggest that evidence of a failure to file a tax return for one year is never admissible. There may be additional circumstances indicating that any such failure was an intentional act of dishonesty.
. We assume, without deciding, that section 42-41713, C.R.S.2013, does not bar evidence of a conviction (by way of guilty plea or otherwise) to impeach specific testimony. ~
