Two German men who visited the Egyptian pyramids in April 2013 now face criminal charges for their attempt to prove their “alternative history” conspiracy theories through vandalism. The men, Dominique Goerlitz and Stefan Erdmann, were joined by a third German, a filmmaker who accompanied them to document their “discoveries.”

The men were allowed to enter the inner chambers of the Great Pyramid at Giza normally off-limits to the public and restricted to authorized archaeologists and Egyptologists. The group reportedly took several items from the pyramids, including taking samples of a cartouche (identifying inscription) of the pharaoh Khufu, also known as Cheops. Goerlitz and Erdmann, who are not archaeologists but have instead been described as “hobbyists,” allegedly smuggled the artifacts out of the country in violation of strict antiquities laws, according to news reports.

In addition to the three Germans, six Egyptians are being held in connection with the case, including several guards and inspectors from the Egyptian Antiquities Ministry who allowed the men into the pyramid. Tourism, one of Egypt’s most important industries, has dropped dramatically in recent years due to social and political unrest. Tour-agency owners including one of the men recently arrested in connection with this case are often willing to bend or break the rules if it means satisfying wealthy foreigners, news reports suggest. The German government expressed outrage over the acts, and categorically stated the men were private citizens and not in any way affiliated with its German Archaeological Institute., Foxnews informs.