Maryann Wellington, 29, was found dead in her Baltimore apartment in the early morning of February 15, 2019. Police discovered her on the kitchen floor in a pool of blood with gunshot wounds to the head and chest; paramedics pronounced her dead at the scene. The call came from Arnold Johnson, her ex-boyfriend and the father of her child, who said he arrived to find the front door and a window open and Wellington unresponsive. Investigators reported no signs of forced entry. Johnson was arrested that day and charged with first- and second-degree murder and weapons offenses.

Johnson’s defense highlighted his frantic 911 call and his distressed appearance on police body cameras. A jury convicted Johnson of first-degree murder in October 2019, but that conviction was later overturned by the Court of Special Appeals; a retrial began in January 2023 and ended in a judge-declared mistrial after several days of testimony. Anyone with information about Wellington, her final hours, or her circle of contacts is asked to share what they know.