James Charles Kopp (born August 2, 1954) is an American citizen who was convicted in 2003 for the 1998 sniper-style murder of Dr. Barnett Slepian, an American physician from Amherst, New York who performed abortions. Prior to his capture, Kopp was on the FBI's list of Ten Most Wanted Fugitives. On June 7, 1999 he had become the 455th fugitive placed on the list by the FBI. He was affiliated with militant anti-abortion group "The Lambs of Christ".