Troy Leon Gregg (April 22, 1948 – July 29, 1980) was the first condemned individual whose death sentence was upheld by the United States Supreme Court after the Court's decision in Furman v. Georgia invalidated all previously enacted death penalty laws in the United States. Gregg was convicted of having murdered Fred Edward Simmons and Bob Durwood Moore in order to rob them. The victims had given him and another man, Dennis Weaver, a ride when they were hitchhiking.