Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 1 FILED United States Court of Appeals UNITED STATES COURT OF APPEALS Tenth Circuit
FOR THE TENTH CIRCUIT November 21, 2025 _________________________________ Christopher M. Wolpert Clerk of Court UNITED STATES OF AMERICA,
Plaintiff - Appellee,
v. No. 25-8009 (D.C. No. 2:24-CR-00076-KHR-1) KEVIN JOSEPH MENDIBLES, (D. Wyo.)
Defendant - Appellant. _________________________________
ORDER AND JUDGMENT * _________________________________
Before HARTZ, EID, and ROSSMAN, Circuit Judges. _________________________________
After being indicted for first-degree murder, Defendant Kevin Mendibles
pleaded guilty to one count of second-degree murder, see 18 U.S.C. § 1111(b), as
part of a plea bargain under Fed. R. Cr. P. 11(c)(1)(C) that set his maximum
sentence at 50 years’ imprisonment. The district court sentenced him to a 40-year
sentence after imposing an upward departure under U.S.S.G. § 5K2.8. Defendant
appeals his sentence, challenging the upward departure because of the district court’s
After examining the briefs and appellate record, this panel has determined *
unanimously to honor the parties’ request for a decision on the briefs without oral argument. See Fed. R. App. P. 34(f); 10th Cir. R. 34.1(G). The case is therefore submitted without oral argument. This order and judgment is not binding precedent, except under the doctrines of law of the case, res judicata, and collateral estoppel.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. Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 2
failure to explain the extent of the departure. Because Defendant failed to raise the
failure-to-explain issue in district court, we review it only for plain error. On
plain-error review we hold that Defendant has failed to meet his burden to show
prejudice from the alleged error. Exercising jurisdiction under 18 U.S.C. § 3742(a)
and 28 U.S.C. § 1291, we affirm the district court’s judgment.
I. BACKGROUND
The presentence report (PSR) calculated Defendant’s total offense level as 35
and his criminal-history category as II. It included the following unchallenged
information about Defendant’s offense conduct: Defendant lived with I.W. They
argued because Defendant believed that she sexually exploited her daughter.
Following the argument, I.W. kicked Defendant out of her home, but he returned
later that night and beat and stabbed her. He reported that he “wanted her to feel” the
beating, and that he hit her with a chair and another object during the beating. R.
Vol. II at 20 (internal quotation marks omitted). Defendant first stabbed I.W. below
the waist, but after the beating he stabbed her in the heart so that she would not
suffer. Defendant then placed I.W. on her bed, covered her body, and left the home.
He reported that he was intoxicated and under the influence of methamphetamine at
the time of the murder. Law enforcement responded at 9:19 p.m., after another
individual found I.W. in bed. They reported that I.W. was breathing when she was
found, but medical personnel could not resuscitate her, and she was pronounced dead
at 9:47 p.m. I.W.’s bedroom was in disarray, with blood on the walls and floors. An
autopsy report noted that I.W. had four stab wounds: two in her sternum and two in
2 Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 3
her sacrum/groin area. She also had several cuts on her body, extensive blunt-force
injuries on her face, and significant blunt-force head trauma. The report noted that
there was no blood on the soles of I.W.’s boots.
The PSR calculated Defendant’s guidelines range as 188 to 235 months’
imprisonment. But it concluded that Defendant’s “conduct in brutally beating I.W.,
the numbers [sic] of times he stabbed her, and then leaving her to die represents
gratuitous infliction of injury, for which an upward departure [under U.S.S.G.
§ 5K2.8] is recommended for a sentence of 50 years’ imprisonment,” the maximum
allowed under the plea agreement. Id. at 31. The PSR did not propose a specific
offense-level increase for the recommended departure.
Defendant argued that the facts of his offense were not unusual enough to
warrant a § 5K2.8 departure. He compared his case to other cases where a defendant
committed second-degree murder or voluntary manslaughter, arguing that his conduct
was not unusually brutal within the range of voluntary manslaughter. Defendant also
submitted several exhibits, including a mitigation report, letters from his family
members, and images from his childhood.
The government requested a 50-year sentence.
At the sentencing hearing the district court “agree[d] to be bound by the
50-year custodial cap as set forth in the parties’ plea agreement.” R. Vol. III at 13. It
then found that the PSR’s calculations were correct and that Defendant’s guidelines
range, before any departures or variances, was 188 to 235 months’ imprisonment.
The government called case agent Dartagnan Deeds to testify in support of the
3 Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 4
statements in the presentence report. He also opined that the lack of blood on the
bottom of I.W.’s boots was significant because it demonstrated that I.W. was not on
her feet during the beating. In proposing a 50-year sentence, the prosecutor stated
that Defendant knew she was suffering, but did not help her and instead chose to kill
her, which led I.W. to a long, painful death.
Defendant’s counsel stated that while Defendant’s crime was horrible, he
acknowledged his wrongdoing, and it did not even rise to the type of conduct seen in
similar cases where defendants received an upward departure. Counsel further stated
that the average sentence for similar defendants convicted of second-degree murder
was 198 months’ imprisonment, and the median sentence was 200 months’
imprisonment. He requested a 188-month sentence. Defendant apologized to the
family of the victim, acknowledged that his crime was horrible, and said that he was
intoxicated and “could hardly remember exactly what happened.” Id. at 43.
The district court thoroughly discussed the factors it needed to consider in
imposing sentence, particularly the factors applicable when death results and the
language of § 5K2.8, and it discussed how the facts of the case applied to those
factors. It then granted the government’s request for a six-level enhancement under
§ 5K2.8, which increased Defendant’s offense level to 41, with a new range for
imprisonment of 360 months to life. In particular, it said “that the unusually heinous,
prolonged, cruel, brutal, and degrading manner in which [Defendant] took [I.W.’s]
life under those circumstances justifie[d] an enhancement under that particular
provision.” Id. at 49.
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Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 1 FILED United States Court of Appeals UNITED STATES COURT OF APPEALS Tenth Circuit
FOR THE TENTH CIRCUIT November 21, 2025 _________________________________ Christopher M. Wolpert Clerk of Court UNITED STATES OF AMERICA,
Plaintiff - Appellee,
v. No. 25-8009 (D.C. No. 2:24-CR-00076-KHR-1) KEVIN JOSEPH MENDIBLES, (D. Wyo.)
Defendant - Appellant. _________________________________
ORDER AND JUDGMENT * _________________________________
Before HARTZ, EID, and ROSSMAN, Circuit Judges. _________________________________
After being indicted for first-degree murder, Defendant Kevin Mendibles
pleaded guilty to one count of second-degree murder, see 18 U.S.C. § 1111(b), as
part of a plea bargain under Fed. R. Cr. P. 11(c)(1)(C) that set his maximum
sentence at 50 years’ imprisonment. The district court sentenced him to a 40-year
sentence after imposing an upward departure under U.S.S.G. § 5K2.8. Defendant
appeals his sentence, challenging the upward departure because of the district court’s
After examining the briefs and appellate record, this panel has determined *
unanimously to honor the parties’ request for a decision on the briefs without oral argument. See Fed. R. App. P. 34(f); 10th Cir. R. 34.1(G). The case is therefore submitted without oral argument. 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. Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 2
failure to explain the extent of the departure. Because Defendant failed to raise the
failure-to-explain issue in district court, we review it only for plain error. On
plain-error review we hold that Defendant has failed to meet his burden to show
prejudice from the alleged error. Exercising jurisdiction under 18 U.S.C. § 3742(a)
and 28 U.S.C. § 1291, we affirm the district court’s judgment.
I. BACKGROUND
The presentence report (PSR) calculated Defendant’s total offense level as 35
and his criminal-history category as II. It included the following unchallenged
information about Defendant’s offense conduct: Defendant lived with I.W. They
argued because Defendant believed that she sexually exploited her daughter.
Following the argument, I.W. kicked Defendant out of her home, but he returned
later that night and beat and stabbed her. He reported that he “wanted her to feel” the
beating, and that he hit her with a chair and another object during the beating. R.
Vol. II at 20 (internal quotation marks omitted). Defendant first stabbed I.W. below
the waist, but after the beating he stabbed her in the heart so that she would not
suffer. Defendant then placed I.W. on her bed, covered her body, and left the home.
He reported that he was intoxicated and under the influence of methamphetamine at
the time of the murder. Law enforcement responded at 9:19 p.m., after another
individual found I.W. in bed. They reported that I.W. was breathing when she was
found, but medical personnel could not resuscitate her, and she was pronounced dead
at 9:47 p.m. I.W.’s bedroom was in disarray, with blood on the walls and floors. An
autopsy report noted that I.W. had four stab wounds: two in her sternum and two in
2 Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 3
her sacrum/groin area. She also had several cuts on her body, extensive blunt-force
injuries on her face, and significant blunt-force head trauma. The report noted that
there was no blood on the soles of I.W.’s boots.
The PSR calculated Defendant’s guidelines range as 188 to 235 months’
imprisonment. But it concluded that Defendant’s “conduct in brutally beating I.W.,
the numbers [sic] of times he stabbed her, and then leaving her to die represents
gratuitous infliction of injury, for which an upward departure [under U.S.S.G.
§ 5K2.8] is recommended for a sentence of 50 years’ imprisonment,” the maximum
allowed under the plea agreement. Id. at 31. The PSR did not propose a specific
offense-level increase for the recommended departure.
Defendant argued that the facts of his offense were not unusual enough to
warrant a § 5K2.8 departure. He compared his case to other cases where a defendant
committed second-degree murder or voluntary manslaughter, arguing that his conduct
was not unusually brutal within the range of voluntary manslaughter. Defendant also
submitted several exhibits, including a mitigation report, letters from his family
members, and images from his childhood.
The government requested a 50-year sentence.
At the sentencing hearing the district court “agree[d] to be bound by the
50-year custodial cap as set forth in the parties’ plea agreement.” R. Vol. III at 13. It
then found that the PSR’s calculations were correct and that Defendant’s guidelines
range, before any departures or variances, was 188 to 235 months’ imprisonment.
The government called case agent Dartagnan Deeds to testify in support of the
3 Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 4
statements in the presentence report. He also opined that the lack of blood on the
bottom of I.W.’s boots was significant because it demonstrated that I.W. was not on
her feet during the beating. In proposing a 50-year sentence, the prosecutor stated
that Defendant knew she was suffering, but did not help her and instead chose to kill
her, which led I.W. to a long, painful death.
Defendant’s counsel stated that while Defendant’s crime was horrible, he
acknowledged his wrongdoing, and it did not even rise to the type of conduct seen in
similar cases where defendants received an upward departure. Counsel further stated
that the average sentence for similar defendants convicted of second-degree murder
was 198 months’ imprisonment, and the median sentence was 200 months’
imprisonment. He requested a 188-month sentence. Defendant apologized to the
family of the victim, acknowledged that his crime was horrible, and said that he was
intoxicated and “could hardly remember exactly what happened.” Id. at 43.
The district court thoroughly discussed the factors it needed to consider in
imposing sentence, particularly the factors applicable when death results and the
language of § 5K2.8, and it discussed how the facts of the case applied to those
factors. It then granted the government’s request for a six-level enhancement under
§ 5K2.8, which increased Defendant’s offense level to 41, with a new range for
imprisonment of 360 months to life. In particular, it said “that the unusually heinous,
prolonged, cruel, brutal, and degrading manner in which [Defendant] took [I.W.’s]
life under those circumstances justifie[d] an enhancement under that particular
provision.” Id. at 49. The court did not, however, offer a reason for choosing the
4 Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 5
particular level of the upward departure. It then sentenced Defendant to 480 months’
(40 years’) imprisonment.
II. STANDARD OF REVIEW
Because Defendant did not object to the district court’s explanation of the
§ 5K2.8 enhancement at sentencing, this court reviews for plain error. See United
States v. Romero, 491 F.3d 1173, 1176–78 (10th Cir. 2007); see also United States v.
Uscanga-Mora, 562 F.3d 1289, 1293 (10th Cir. 2009) (“[P]lain error review obtains
when counsel fails to render a contemporaneous objection to the procedural adequacy
of a district court’s statement of reasons at sentencing.”). Under plain-error review,
Defendant must show “(1) an error, (2) that is plain, which means clear or obvious
under current law, and (3) that affects substantial rights. If he satisfies these criteria,
this Court may exercise discretion to correct the error if it seriously affects the
fairness, integrity, or public reputation of judicial proceedings.” United States v.
Goode, 483 F.3d 676, 681 (10th Cir. 2007) (internal quotation marks omitted). For
an error to affect Defendant’s substantial rights, there must be “a reasonable
probability that, but for the error claimed, the result of the proceeding would have
been different.” United States v. Bustamante-Conchas, 850 F.3d 1130, 1138 (10th
Cir. 2017) (internal quotation marks omitted).
III. ANALYSIS
Defendant argues, and the government concedes, that the district court erred
when it failed to explain the reason for the degree of the upward departure. We
5 Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 6
agree. But Defendant still must prove prejudice. See Bustamante-Conchas, 850 F.3d
at 1138. This he has not done.
We need not repeat a description of the brutality of Defendant’s offense. The
district court clearly knew the details. Its rationale for imposing the § 5K2.8
enhancement was clear and is supported by the evidence in the record. See United
States v. Robertson, 568 F.3d 1203, 1215 (10th Cir. 2009); Uscanga–Mora, 562 F.3d
at 1295 (“The defendant thus received a sentence merited by the evidence, and we
cannot say—as we would have to in order to find plain error—that, but for the
claimed error, the defendant’s sentence would have been any different.”).
Here, Defendant’s crime closely resembled first-degree murder. His plea
agreement contemplated a sentence as high as 50 years. The PSR recommended a
sentence of 50 years. This is not a case where a sentencing judge’s further
consideration of subtle issues regarding how to precisely calculate the proper level of
departure would be likely to affect the ultimate sentencing decision. Defendant has
not persuaded us that requiring the district court to expend further effort in
explaining the level of departure would be at all likely to result in a lesser sentence.
Even though the district court erred by inadequately explaining its reasons for
departing upward by six levels, Defendant cannot establish that the error affected his
substantial rights.
6 Appellate Case: 25-8009 Document: 39-1 Date Filed: 11/21/2025 Page: 7
IV. CONCLUSION
We affirm the district court’s judgment.
Entered for the Court
Harris L Hartz Circuit Judge