MEROM, Ind. (AP) — State police say they've interviewed about 80 people so far in their ongoing investigation into the slaying of an 85-year-old retired western Indiana farmer.

State police Sgt. Joe Watts tells the Tribune-Star (http://bit.ly/12H1akl ) the interviews aren't with suspects but people who might have information that could help solve the case.

Lowell Badger was found fatally shot Dec. 8 in the bedroom of his home in rural Merom about 30 miles south of Terre Haute. State Police believe a 46-inch Sony Bravia LCD television was among the items taken from Badger's home at the same time as the shooting.

Watts says a reward fund for information in the case has grown to $25,000. He says detectives are working "feverishly on this case."

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Information from: Tribune-Star, http://www.tribstar.com