Robert Joseph Duke, 46, known as Red Bird, was shot and killed in his South Bend apartment on the evening of January 4, 2015. The killing followed an attack by a fellow tenant, Roy L. Walker, who also fatally shot 43-year-old Michelle L. Blankenship earlier that night in her own apartment. A third person in Duke’s apartment survived when the assailant’s gun failed to fire.

Walker, reportedly naked and armed when officers found him, was arrested shortly after the rampage; he was wearing only socks and had a rope around his neck. Authorities charged him with two counts of murder, one count of attempted murder and one count of residential entry. Investigators said Walker knew the victims and did not regard the violence as random, though no clear motive was reported.

If anyone knew Robert Duke, his routines, or saw anything in that building the evening of January 4, 2015, please come forward with information.