A year ago Friday, Roger Dale Self's body was found by family and friends on his property on Five Points Road in Decatur, Tenn.
Now, the Tennessee Bureau of Investigation is seeking information that could lead to an arrest in the killing.
Investigators said Self had been missing since the evening before his body was found in a barn on his property where he stored hay and straw.
Investigators determined Self was killed sometime after 6:30 p.m. on Sept. 22, 2010. An autopsy confirmed he was shot multiple times at close range with a .22-caliber handgun.
Investigators believe Self either knew or was acquainted with his killer, according to TBI officials.
"We'd like to emphasize that it only takes one small piece of information that can lead an investigator to solve a case," TBI spokeswoman Kristin Helm said.
"So if someone knows something about Mr. Self and those who knew him that might be unusual or suspicious, that information could be important," she said. "TBI has been working this case for a year and is always open to receiving new information."
The killing was a shock to the small town, Decatur Police Chief Monty Rowland said.
"Everybody's wanting to know what happened," Rowland said. "The Selfs are good people."
Rowland said Decatur investigators are "following up every lead we get."
Anyone with information about the slaying is asked to contact the Decatur Police Department at 423-334-5716 or TBI at 800-824-3463.