The crime took place on the evening of October 2, 2009.
Tony Harrelson, a highway contract driver for the United States Postal Service, was violently gunned down at the Camp Hill, AL post.
In recent months, tips have come in from the public, but there are still no leads pertaining to Harrelson's murder.
The Postal Service is offering a $100,000 reward for information leading to an arrest and conviction of those responsible for the murder.
If you have a tip, call the United State Postal Inspection service at 877-876-2455 or the Tallapoosa County Sheriff's Department at 256-825-4264, OR the secret witness number at 256-827-2035.