 Complete the following phrase:  The disappearance, and often presumed death, of an individual may also become a cause for conspiracy theorists. Theories of a cover-up surrounding the 1974 disappearance of Lord Lucan following the murder of his familys ny include, for example, allegations of a suicide plot whereby his body was fed to tigers at Howletts Zoo. Numerous conspiracy theories have also attended the 2007 disappearance of English girl 