On December 26, 2017, gunfire erupted in a home on Columbia Avenue in Swissvale, just outside Pittsburgh. Walter E. Stewart Jr., 29, was found dead at the scene from gunshot wounds. His 7-year-old son, Jo Lawrence Stewart, was discovered lying on top of his father, critically injured; the boy was taken to a children’s hospital and died a short time later. Authorities described the incident as an exchange of gunfire and said it appeared to have stemmed from a drug deal that escalated into a robbery attempt.

Three people were identified and arrested: Donavan Wilson, 23, and brothers Brandon Barnett, 26, and Jacqua Barnett, 30. Each faced two counts of homicide and conspiracy. Brandon Barnett was also hospitalized with multiple gunshot wounds. Prosecutors later withdrew all homicide and conspiracy charges against Wilson and both Barnett brothers after a key witness in the case died, which prosecutors said created evidentiary problems; officials left open the possibility charges could be refiled.

Does anyone have information about the shooting or knew Walter or Jo Lawrence that could help clarify what happened that afternoon?