ST. JOSEPH, Mo. (AP) - A fire has destroyed the home where an elderly St. Joseph couple was shot to death by their grandson.
 
The Buchanan County Sheriff's Office says firefighters responded Monday afternoon to the blaze at the home of James and Beverly Johnson.
 
The Johnsons were fatally shot in July at the home in rural Buchanan County. Their grandson, Joseph Johnson, pleaded guilty in December to two counts of second-degree murder. He is awaiting sentencing.
 
The St. Joseph News-Press reports the home was not occupied. The cause of the fire is under investigation.
 
The Missouri State Fire Marshal and the Buchanan County Sheriff's Office are investigating.