It’s been over 20 years since the debut of the notorious “alien autopsy” film—back then it was all the rage on late-night talk radio. The Magonia Review has an excellent run-down of the whole incident, including how it was faked and who did the faking. Interesting and informative.
http://pelicanist.blogspot.com/2018/06/from-cannes-to-camden-story-of-alien.html