Derrick Mitchell, a 35-year-old African American man from Chicago, was fatally shot in the chest inside his Humboldt Park apartment on May 26, 2020. A 23-year-old woman who was with him was grazed in the leg. The Cook County medical examiner ruled the death a homicide.

Police arrested 23-year-old Davon Sumrall and charged him with first-degree murder. Sumrall told authorities he acted in self-defense, but investigators say they recovered text messages in which he expressed plans to rob Mitchell. Officers also recovered Mitchell’s revolver and other evidence at the scene. Sumrall was held without bail and had a court date set for July 6, 2020.

Reports say Mitchell and the woman were preparing bags of drugs to sell when Sumrall arrived, confronted them, and then fired multiple rounds. What information do readers with knowledge of the neighborhood or the people involved have that could help this investigation?