On March 30, Grand Prairie police say, a magazine subscription salesman knocked on the door of a 78-year-old woman, raped her, poured rubbing alcohol on her chest, and set her on fire. The question right now is not "How did this happen?" but "When and where will it happen again?" Police quickly arrested Daniel Deshawn Neal, 23, who was awaiting trial on trespassing and burglary charges in Maryland. When Neal was arrested, he told Grand Prairie police he worked for a Washington, D.C.-based compan