 Police say Watson got into an altercation July 2nd in a home near 46th Street North at MLK and was fatally shot in the head. Keith Stewart was arrested last week and charged with first-degree murder for the killing. Investigators say Stewart's sister, Celestine Mason, was living in a van in Watson's backyard and was also involved in the shooting. She was taken into custody Monday and charged with first-degree murder and threatening an act of violence. A Green Country man is behind bars after chasing down an off-duty police officer.