This page contains many of the most significant cases in UFO history. Opinions or theories drawn about these cases are the product of the individual author or organization. These files come from a variety of sources, and all source information was kept intact, therefore any and all copyrights are honored. This page is frequently updated so please come again. All of the case files written by B J Booth, webmaster of the UFO Casebook, are free to distribute with a link back to the Casebook. Notes: The categories displayed on the top of the table are presented for ease of selection of cases based on certain criteria. Many times it is difficult, however, to assess whether or not a physical trace or effect occurred. This effect can be many things, a beam of light, a radar confirmation, a broken tree branch, disturbed or damaged earth, soil impressions, a smell, a sound, electromagnetic effects, reaction from animals, i.e. anything relating to the object or humanoid in question. This designation is based on witness statements. Multimedia can be a picture, film footage, or other media. A Yes in this category means that a witness affirmed that a picture or film was taken, not necessarily that it is available now. Are you looking for case study help from expert writers? Try professional case study writing service getcasestudy.com.