When Woody Harrelson first rose to fame on the sitcom Cheers in 1985, his father had already made headlines for a much more nefarious reason. Charles Voyde Harrelson was given two life sentences for the murder of Texas judge John H. Wood Jr. - the first assassination of a US federal judge in the 20th century. While Woody would go on to enjoy a long and successful career in Hollywood, Charles's conviction was the end of a decades-long stint as a professional hitman. Although he was only ever convicted of two contract killings, it's believed that he was involved in many more.