This past weekend marked the 15th-anniversary of a still unsolved double-murder case in Jackson County Florida.
In January 1989, Robert and Katherine McRae were killed inside their Graceville mansion. The elderly couple was tied-up and each had been fatally shot in the head.
Authorities say the killings may have been the result of a home invasion that wasn't completed.
Over the next few years, police looked at several similar murder cases in surrounding states. But, no one was ever arrested in the McRae murders.
Authorities continue to track leads. If you have any information on the crime, you are asked to contact your nearest law enforcement agency.