On the evening of Valentine’s Day, February 14, 2026, 31-year-old Marcquila Harris was shot in the 800 block of West Chambers Street in Jacksonville, Illinois. Officers responding to reports of gunfire just before 6:00 p.m. found Harris with a life-threatening gunshot wound; she was taken to Jacksonville Memorial Hospital and died later that evening.

The Jacksonville Police, Illinois State Police and the Morgan County Sheriff’s and Coroner’s offices led the investigation. Investigators identified a person of interest overnight and the next day 23-year-old Marissa Teubner of Jacksonville presented herself at the police department and was arrested. The Morgan County State’s Attorney filed three counts of first-degree murder and a charge of aggravated discharge of a firearm against Teubner. A judge ordered her to remain in custody and a preliminary hearing was set for early March; a public defender was appointed.

No motive has been released. If anyone saw activity on West Chambers Street that evening or has information about Harris or the events leading up to the shooting, please share what is known with investigators.