Benjamin Radford is an American writer, investigator, and skeptic. He has authored, coauthored or contributed to over twenty books and written over a thousand articles and columns on a wide variety of topics including urban legends, unexplained mysteries, the paranormal, critical thinking, mass hysteria, and media literacy. His book, Mysterious New Mexico: Miracles, Magic, and Monsters in the Land of Enchantment, was published in the summer of 2014 and is a scientific investigation of famous legends and folklore in the state of New Mexico. In 2016 Radford published Bad Clowns, a 2017 IPPY bronze award winner, and he is regarded as an expert on the bad clowns phenomenon.

The evil clown, or creepy clown, also known as the killer clown if their character revolves around murder, is a subversion of the traditional comic clown character, in which the playful trope is instead depicted in a more disturbing nature through the use of horror elements and dark humor. The modern archetype of the evil clown was popularized by the DC Comics supervillain Joker starting in 1940, and again by Pennywise in Stephen King's It. The character can be seen as playing on the sense of unease felt by sufferers of coulrophobia, the fear of clowns.