State v. Tuopeh

2025 S.D. 16
CourtSouth Dakota Supreme Court
DecidedMarch 12, 2025
Docket30365
StatusPublished
Cited by1 cases

This text of 2025 S.D. 16 (State v. Tuopeh) is published on Counsel Stack Legal Research, covering South Dakota Supreme Court primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
State v. Tuopeh, 2025 S.D. 16 (S.D. 2025).

Opinion

#30365-a-JMK 2025 S.D. 16

IN THE SUPREME COURT OF THE STATE OF SOUTH DAKOTA

****

STATE OF SOUTH DAKOTA, Plaintiff and Appellee,

v.

STEVEN TUOPEH, Defendant and Appellant.

APPEAL FROM THE CIRCUIT COURT OF THE SECOND JUDICIAL CIRCUIT MINNEHAHA COUNTY, SOUTH DAKOTA

THE HONORABLE JAMES A. POWER Judge

MARK KADI TRACY MILLER of Minnehaha County Office of the Public Advocate Sioux Falls, South Dakota Attorneys for defendant and appellant.

MARTY J. JACKLEY Attorney General

JACOB R. DEMPSEY Assistant Attorney General Pierre, South Dakota Attorneys for plaintiff and appellee.

ARGUED APRIL 25, 2024 OPINION FILED 03/12/25 #30365

KERN, Justice

[¶1.] Christopher Mousseaux was beaten to death during an altercation

with Steven Tuopeh and Jeff Pour near the Red Sea Pub in downtown Sioux Falls.

Although Tuopeh and Pour were initially charged as co-defendants, their cases were

severed and Pour entered into a plea bargain agreement with the State. 1 After a

trial, the jury found Tuopeh guilty of second-degree murder and first-degree

manslaughter. Tuopeh appeals, arguing that the circuit court erred by failing to

give Tuopeh’s requested jury instructions, in denying his motion for judgment of

acquittal, and in several legal and evidentiary rulings. We affirm.

Factual and Procedural Background

[¶2.] In the evening hours of October 10, 2021, Steven Tuopeh and Jeff

Pour, along with several other individuals, were standing around the outside

entrance to the Red Sea Pub in downtown Sioux Falls. 2 At some point, they became

aware of an individual in a white t-shirt—later identified as Christopher

Mousseaux—approaching from the east. Several males, including Tuopeh and

Pour, intercepted Mousseaux before he reached the pub entrance. Although the

encounter initially seemed amicable, Mousseaux, who appeared intoxicated, started

vigorously pulling up his pants, stepped forward, and then suddenly swung at

1. Pour pled guilty to first-degree manslaughter and was sentenced to serve 50 years in prison.

2. An armed security guard, Sean Tika, was also standing at the front entrance near the group. Surveillance video from the Red Sea Pub and other neighboring businesses captured much of the encounter.

-1- #30365

Tuopeh and Pour with his right fist. Mousseaux, while still facing Tuopeh and

Pour, started skipping and hopping backwards down the street, away from the pub.

[¶3.] Tuopeh and Pour followed Mousseaux for some distance and ultimately

began running towards him, with Tuopeh in the lead. Once Tuopeh and Pour were

closing in, Mousseaux turned his back towards his pursuers and attempted to run a

few steps. However, likely due to his intoxication, he almost immediately tripped

and fell. Tuopeh and Pour began punching and kicking Mousseaux as soon as he

hit the pavement. 3 After delivering a brutal beating, Tuopeh and Pour walked

away, leaving Mousseaux lying motionless on the ground.

[¶4.] Law enforcement eventually received reports concerning a potential

stabbing or car-on-pedestrian collision in the area. Police officers responding to the

scene found Mousseaux prone on the ground, in a pool of blood and vomit.

Mousseaux was taken to the Avera McKennan Hospital in Sioux Falls. He died a

few days later, on October 13, 2021, from the blunt force trauma inflicted on him

during the beating. At the time of his arrival at the hospital, Mousseaux had a

blood alcohol content of .245.

[¶5.] An autopsy performed by Dr. Kenneth Snell revealed rib and skull

fractures, as well as hemorrhaging in the skull. In addition to numerous other

injuries, Dr. Snell observed several lacerations 4 to Mousseaux’s head: one on the

upper left side of the forehead and four on the back of the head. There was also a

3. Surveillance video and trial testimony support the assertion that both Tuopeh and Pour punched Mousseaux.

4. Dr. Snell explained at trial that “a laceration is a tearing of the skin due to blunt force injury.”

-2- #30365

puncture wound in between two of the four lacerations on the back of his head.

Beneath these lacerations were several skull fractures, including a “very complex”

fracture on the front and back of Mousseaux’s skull. 5 As a result of the serious head

injuries Mousseaux received, his brain hemorrhaged, causing substantial swelling

of brain tissue, which pushed the brain into the spinal cord canal. According to Dr.

Snell, this traumatic brain injury caused Mousseaux’s death, not the other injuries

to his arms, legs, and ribs.

[¶6.] During the ensuing criminal investigation, detectives interviewed

Pour, who acknowledged his presence at the Red Sea Pub on the night in question.

However, Pour denied beating Mousseaux after he tripped and fell to the ground.

Pour identified a person called “Ceano” 6 as having also been involved in the

altercation with Mousseaux. Investigators were able to obtain footage of the

incident from the Red Sea Pub and other neighboring establishments. One

photograph appeared to show “Ceno,” an African American male, holding an object

comprised of two rings and a spike at the base of his fingers, prior to the

confrontation with Mousseaux. Based on a Facebook profile, law enforcement

officers were able to identify “Ceno” as Tuopeh. After obtaining a warrant, officers

searched Tuopeh’s residence and located several items of evidentiary value,

including a pair of tennis shoes, matching the shoes worn by Tuopeh as depicted on

5. Dr. Snell testified that a complex fracture on the forehead, like the one Mousseaux suffered, would require a substantial amount of force—the equivalent of falling from a second floor or higher onto a rock.

6. In describing the suspect, Pour spelled the name “Ceano” for the investigators, however the Facebook profile and notebook used the spelling, “Ceno.”

-3- #30365

the video footage, and a pair of blue jeans with blood stains. Law enforcement also

found a notebook with apparent rap lyrics written by “Ceno.”

[¶7.] A Minnehaha County grand jury jointly indicted Tuopeh and Pour on

three counts: Count 1, second-degree murder (depraved mind) in violation of SDCL

22-16-7; Count 2, first-degree manslaughter (heat of passion) in violation of SDCL

22-16-15(2); and Count 3, first-degree manslaughter (dangerous weapon) in

violation of SDCL 22-16-15(3). 7 However, after Pour reached a plea bargain

agreement with the State, the cases were severed. Prior to trial, Tuopeh moved for

a grant of statutory immunity from criminal prosecution, pursuant to SDCL 22-18-

4.8, based on his claim that he was acting in self-defense. After an immunity

hearing, the circuit court determined that Tuopeh made a prima facie case of self-

defense by showing that Mousseaux had thrown the first punch. However, the

court determined that the State carried its burden of rebutting the prima facie case

by clear and convincing evidence. The court specifically found that, at the time of

the beating, Mousseaux had turned his back to run, had fallen to the ground and no

longer posed an imminent threat to Tuopeh. Furthermore, the court concluded

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Cite This Page — Counsel Stack

Bluebook (online)
2025 S.D. 16, Counsel Stack Legal Research, https://law.counselstack.com/opinion/state-v-tuopeh-sd-2025.