SULLIVAN, Ind. (AP) — Police investigators have renewed their plea for information about the unsolved 2012 killing of a retired farmer found shot to death in his western Indiana home.

85-year-old Lowell Badger was found fatally shot on Dec. 8, 2012, following a burglary at his rural Sullivan County home about 30 miles south of Terre Haute.

The new request for tips comes a year after police released photos showing vehicles that may have been in the area around the time Badger was killed.

A reward of about $30,000 is available for whoever provides information leading to the arrest and conviction of those responsible for Badger’s death.