MADISON, WI (WTAQ) - Two people have been charged with helping a Dane County man kill his autistic step-brother.

Prosecutors said 28-year-old Robert McCumber of Mazomanie owned the land where Matthew Graville’s body was hidden and buried. And the victim’s stepmother, 49-year-old Laura Robar of Fort Atkinson, allegedly conspired to hide the body, and stole money and food stamps from Graville after he died.

The step-brother, 28-year-old Jeffrey Vogelsberg, was arrested in Washington State this week. He faces extradition to Wisconsin on charges of homicide and hiding a corpse.

McCumber is charged in Dane County with hiding a corpse, and Robar with two counts of identity theft. Both are being held under $100,000 bonds – and both are due back in court next Tuesday for preliminary hearings.

Authorities said Vogelsburg abused and tortured the 27-year-old Graville, placed his body in a freezer, and then buried him. The body was found in a 5-foot deep grave in a wooded area near Lone Rock.

Vogelsburg was arrested at a military base where his wife works. Prosecutors said she knew about the crime. She has not been charged, but officials say more charges in the case are possible.

WISC-TV in Madison said Robar was fired Wednesday from a job at the Dane County Human Services department.