A federal grand jury indicted Rodrick Dow Craythorn, 52, last month on two counts related to damaging archaeological resources and US property, according to a statement issued Thursday from the US Attorney's Office for the District of Wyoming.
Prosecutors say the incidents took place between October 1, 2019, and May 24, 2020, in the historic Fort Yellowstone Cemetery.
Prosecutors said Craythorn was searching for the Forrest Fenn treasure -- an almost mythical horde of gold, jewels and artifacts that eluded fortune hunters for a decade.
Fenn, 90, died last month, but not before he revealed that an anonymous man from "back East" had found the treasure in June of this year.
Craythorn's trial is set for December 14, 2020, in US District Court in Casper, Wyoming, according to the US attorney's office.