breaking news the man suspected of stabbing several people, was taken in to custody in harlem and suspected of wounding five people at a celebration in monsey, new york, they are having the hate crimes task force investigate the mass stabbing. new york stepped up patrol after a wave of anti-semitic attacks -- in recent weeks. back to "dateline." >> reporter: it had always been an issue in the case against steve democker: that one fascinating clue that could break the case wide open. who was "mr. 603"? that's what people were calling the mysterious dna found under carol's fingernails after she