The judge kept JK Athree in adult court as his defense challenges early police statements.

SIOUX CITY, Iowa — A Sioux City teenager accused of fatally stabbing a 43-year-old man on New Year’s Day will remain in adult court as lawyers prepare for a November trial in Woodbury County District Court.

JK Athree, now 18, is charged with first-degree murder in the death of Jermel Ellington, whose body was found Jan. 1 in a car in an alley near a Cook Street residence. The case has moved from the first emergency response to a fight over how the prosecution may use statements Athree allegedly made after his arrest. The charge carries major stakes for Athree, who was 17 at the time, and for Ellington’s family as the case heads toward trial.

Police said officers were called around 11:20 a.m. to a reported disturbance at 409 Cook St. and found Ellington in a car parked in an alley near the home. He had suffered 16 stab wounds and was taken to a hospital, where he was pronounced dead. Investigators said Athree and Ellington knew each other and described the killing as an isolated incident. After officers arrived, Athree was taken into custody at the residence. Police said there was no continuing threat to the public, but the early call led to a first-degree murder charge the same day.

The later court record filled in a darker account of what police say happened before the 911 call. Athree had been in a parked car with Ellington and several others, and people in the car were drinking alcohol, according to reports of the case. After a short exchange of words, police say Athree stabbed Ellington several times, striking him in the thigh, back, neck and chest. Investigators say Athree then stayed in the car for more than an hour while listening to music, even though he knew Ellington was dead. Authorities have not said in public filings whether any weapon has been found or what each person in the car told police.

The case also includes an alleged confrontation inside Athree’s family home after the stabbing. Police say Athree went inside and told relatives there was a dead body outside. Instead of calling for medical help or telling officers immediately, he allegedly wanted family members to help him hide evidence or move the body. When relatives rejected that request and contacted emergency services, Athree became aggressive and tried to flee, according to police accounts cited in court reporting. Officers detained him at the home. The family members who called 911 have not been publicly identified in available reports.

Investigators have described a months-old feud between Athree and Ellington as part of the background. That dispute allegedly began when Ellington caught an intoxicated Athree trying to burglarize vehicles and stabbed him with a screwdriver. Their paths crossed again on Jan. 1, when Ellington joined Athree and others in the parked car. The earlier incident has become important because it may shape how prosecutors describe motive and how the defense frames the encounter. Prosecutors have not publicly released a full theory of why the argument in the car turned deadly. The defense has indicated that self-defense, insanity, intoxication and diminished responsibility could become trial issues if certain statements remain in the case.

District Judge Robert D. Tiefenthaler rejected an effort to move Athree’s case to juvenile court. In a 13-page ruling, the judge said the adult system would provide longer supervision and services than juvenile court, which would lose authority over Athree too soon to meet the needs of the case. Tiefenthaler wrote that district court offered the course most likely to support rehabilitation and public safety. The decision keeps Athree in the same court system used for adult defendants, even though he was a minor when Ellington was killed. It also means the case will continue under the adult criminal trial schedule unless a higher court or later order changes that path.

Athree’s public defender, Brendan Kelly, has asked the court to suppress statements Athree allegedly made to law enforcement soon after his arrest. The defense says those statements were not obtained legally because Athree was in custody, his mother was involved in the waiver of rights, and she did not speak English as her native language. The motion says no interpreter was present to ensure she understood her son’s rights or her own ability to speak with him before any decision about counsel. The defense also says Athree was intoxicated when the statements were made, which it argues undercuts any claim that the statements were knowing, intelligent and voluntary.

The suppression fight could shape the trial. If the judge allows the statements, prosecutors may be able to use Athree’s alleged words as evidence of what happened in the car and afterward at the home. If the judge keeps them out, the state would have to lean more heavily on witness accounts, physical evidence, medical findings and any other records gathered by police. The defense has not denied in public filings that Ellington died from stab wounds, but it has signaled that the meaning of Athree’s conduct, his mental state and the circumstances of the confrontation will be disputed. Athree has pleaded not guilty.

The scene that morning began as a disturbance call and became a homicide investigation centered on one alley off Cook Street. Officers, medics and investigators arrived in a residential area where a holiday morning had turned into a crime scene. Ellington, 43, was from Sioux City. Athree was a Sioux City teenager who soon would face a charge normally reserved for the most serious killings. Police said the people involved knew one another, which helped investigators describe the case as isolated. Still, the details later described in court, including the hour in the car and the request allegedly made to family members, pushed the case into wider public attention.

Athree remains held in the Woodbury County Jail on a $500,000 bond, while hs trial is scheduled for Nov. 17, 2026, in Woodbury County District Court, with pretrial rulings expected to decide what statements and defenses jurors may hear.

Author note: Last updated June 19, 2026.