Matthew Buis, 39, was lodged in the Putnam County Jail for his alleged role in the death of Clifford Hulse, 57.
Putnam County Sheriff's Department Chief Deputy Doug Nally said he was not at liberty to discuss many details of the case yet, but he did confirm that a firearm is believed to have been involved.
"We were called out this morning at 3 a.m. to a resident at Van Bibber Lake," Nally said.
A press release from the Putnam County Prosecutor's Office said Hulse's death was "under investigation," and that "the prosecutor's office will not make a determination as to what charges will be filed in this case until Dr. (Roland) Kohr has performed an autopsy."
That autopsy, according to the release, will be conducted at 8 a.m. Wednesday in Terre Haute.
"After the conclusion of the autopsy, meeting with the sheriff's department detectives on this case and reviewing all statements taken, a decision will then be made as to what, if any, charges will be filed," the release said.
Putnam County Jail representatives confirmed that Buis was an inmate. No court dates have been set, but Indiana statute dictates that an initial hearing must be held "promptly" -- in most cases within 48 hours.