It has been exactly 41 years since the discovery of a teenage girl's body in a cornfield in Caledonia.
The body was finally identified five years ago as that of 16-year-old Tammy Jo Alexander, from Brooksville, Florida.
She had been shot, and no one has been arrested.
The Livingston County Sheriff's office today released clips of Tammy's voice -- recorded on a tape she sent to her boyfriend a few months before she died.
The FBI is still offering up to $20,000 for information that could lead to Tammy Jo's killer.