The discovery of a body on the Kickapoo Reservation, located west of Horton in Brown County, leads to an investigation.
Kickapoo Tribal Police Chief Nathan Gray told MSC News the body was found Sunday afternoon along the 700 block of 129th Road.
Gray said the body is that of 54-year-old Anthony Walker.
The cause of death is not known, and an autopsy is being conducted.
Foul play is not suspected.
Walker was set to face a jury beginning in August.
That followed a not guilty plea he entered last month in Brown County District Court to 12 counts stemming from a 10-hour standoff on the reservation in November.
MSC News Brian Hagen contributed this story.