William Clyde Gibson III (born October 10, 1957) is an American serial killer and rapist who is currently on Indiana's death row for the sexually-motivated murders of two women in 2002 and 2012, in addition to serving a 65-year sentence for a third murder committed in 2012. A habitual criminal noted for his increasingly violent streaks and his handlebar moustache, Gibson has claimed responsibility for upwards of 30 additional murders across multiple states, none of which have been conclusively confirmed thus far.