James C. Kopp has answered the question he asked reporters covering his extradition hearing in France nearly 18 months ago. "Who killed Dr. Slepian?" Kopp responded as the press shouted questions at him in a courthouse in Rennes, France. "That's the only question you should ask." Kopp has now told The Buffalo News that he killed Dr. Barnett A. Slepian. Just as federal agents charged, he said he waited in the woods behind Kopp's Amherst home on Oct. 23, 1998, and fired a single shot from a Soviet assault rifle. Kopp's jailhouse confession, three months before his trial on murder...