Charges have been filed against four people in federal court in Green Bay.
Prosecutors say the four put Stephanie Greenspon’s body in a vehicle after she suffered a fatal overdose, then set it on fire last August.
Her remains and the burned vehicle were found on the Menominee Indian Reservation.
Emerson Reed, Keith Wilber Junior and Kayla Childs are charged with concealing a felony.
Reed and Wilber are charged with arson and Timothy Snider Junior faces drug charges and obstruction of justice.
The U-S Attorney’s Office says Greenspon overdosed in Brown County and was moved to the reservation before the fire was set to conceal evidence.