In 2007 Nicolas Cage and Leonardo DiCaprio got into a bidding war for a 67-million-year-old tyrannosaurus bataar skull. Cage won, but later found out the skull had been illegally smuggled into the United States. He will return it to the Mongolian government.
According to a 2013 story in the Telegraph, “the skull was obtained by IM Chait from Eric Prokopi, a self-described ‘commercial palaeontologist’ who pleaded guilty last year to illegally importing fossils from Mongolia and China.”