Tragedy in Sioux Falls as Mother Killed | Sioux City News

Sioux City News Today | 2 Min News | The Daily News Now! · Aug 4, 2026 · 1m

A shocking murder in Sioux Falls leaves a community reeling: 46-year-old Yien Dak Duop Chiek is charged with first-degree murder after stabbing his former partner, 43-year-old Nysam Chagi—a beloved mother of five and local businesswoman—just days after she’d obtained a protection order against him. Police tracked him across state lines via surveillance, ending in a deadly 120+ mph chase that led to his arrest in Iowa on additional charges. As the grieving family seeks support for their children aged 5 to 18, Sioux Falls leaders call it a tragedy that will echo through the city. Listen in…