District Attorney Stephen A. Zappala Jr., right, visits the scene where Officer Michael Crawshaw was fatally shot Sunday night in his patrol car while responding to a call for gunfire at the home on Johnston Road in Penn Hills. The District Attorney's Office visited the site on Wednesday morning to review evidence in the homicide case against Ronald Robinson, 32, who is accused of gunning down Crawshaw after fatally shooting another man inside the house. Zappala spoke with members of the media about the tragic event after his visit to the site.