Foul play is suspected in the fire at Boyne Highlands Resort in December. The fire damaged around 70 rooms and injured a dozen people.
Emmet County Prosecutor James Linderman says his office is in the process of reviewing the investigation.
"Since this is an arson investigation and a rather high-level investigation, we did have the assistance of certain agencies," says Linderman. "The primary would be the Emmet County Sheriff’s Office.”
The sheriff's office passed its report on the fire to Linderman last week.