OVID TOWNSHIP, Mich. - Not many leads are arriving these days in the 2006 killing of a Tucson couple who were staying at a Clinton County house while their daughter and her family were out of town.
Investigators still don't know why that house in Ovid Township was targeted.
The unsolved homicides of Thomas and Viola Hefton remains one of the mid-Michigan county's biggest mysteries, the Lansing State Journal says.
The Heftons were both in their mid-70s and were visiting for the summer. They were killed the night of July 2, 2006.
Early the next morning, their daughter's family returned home from a cabin in the Upper Peninsula and found the bodies.
County Undersheriff Jack Phillips calls the case "a real whodunit."
Hefton, a retired U.S. Postal Service mechanic, and his wife moved to Tucson in 1986, according to Star news archives.
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The couple had left their tidy mobile-home park off West Ajo Way late in the spring - as they had for the last 20 years - to spend the summer in Clinton County, the Star reported in 2006.
Thomas Hefton was found near the front door. His wife's body was in another room.
The only item missing, investigators said, was Hefton's wallet, which might have contained about $200. Whoever is responsible left computers and televisions in the house and cars in the driveway.
The last substantial lead was about three to four months ago, but it didn't go anywhere, Phillips said
