Small planes crash for any number of reasons — mechanical errors or a pilot’s simple mistake, to name just a few. And regardless of the cause, search teams and investigators can typically find out what happened once they investigate.

In 2017, however, when a plane crashed in the Canadian wilderness, authorities needed just one quick look at the destruction to know they were not facing a typical investigation. In fact, the more they dug into it, the more mysterious the crash seemed…

In March 2017, authorities dispatched investigators to a remote wooded area just outside of a mining town in Ontario, Canada. There, reports indicated, they would find a downed plane.