Six-year-old Isis Allen of Pittsburgh was struck by a stray bullet on the night of July 17, 2016, while with her babysitter in the Knoxville neighborhood. She was taken to UPMC Children’s Hospital of Pittsburgh, fought for three days, was taken off life support and died on July 20.

Police say the shooting began when 19-year-old Kamau Thomas Jr. went to Sarah Street to act as security for a planned fight between two women. An argument with another man led Thomas to retrieve a gun; he fired multiple shots from an alley toward a porch where people were gathered, intending to scare the other man. One bullet struck Isis. Thomas told investigators he had been aiming at a roof and that the gun fired repeatedly until the magazine emptied; he said he did not realize a child had been hit until seeing news on social media.

Thomas was arrested and initially charged with attempted homicide, reckless endangerment and aggravated assault; after Isis’s death the charges were upgraded to include criminal homicide. In February 2017 Thomas, then 20, pleaded guilty to third-degree murder and was sentenced to 15 to 40 years. Isis’s mother, Taquea Sykes, said she could not forgive him and subsequently moved away from Pittsburgh.

Did anyone in Knoxville that night see or hear details about the confrontation on Sarah Street that could shed more light on what happened?