Month after mass shooting, Rochester seeks answers, suspects

It's the big question looming over one of this year's bloodiest mass shootings: Who opened fire at a crowded house party in Rochester, New York, on the last weekend of summer, killing two teenagers and wounding 14 other people?Nearly a month a fter gunshots rang out just after midnight on Sept. 19,there have been no arrests, no rewards offered and little word from authorities on where the investigation stands.Rochester, a post-industrial city of about 206,000 people on the shores of Lake Ontario