Authorities hope that it'll be just one more piece of information that will eventually lead them to what authorities call a cold blooded killer.

Authorities tell TV20 about their latest efforts to find Linda Raulerson's murderer.

Sheriff's deputies took tracking dogs to the store near I-10 in hopes of finding the gun the killer used during the robbery, but they couldn't find anything.

Deputies won't stop looking for the person responsible for one of the worst crimes the county has ever seen.

"With the audio I heard this morning, I heard it," said Lt. Ed Seifert with the Columbia County Sheriff's Office. "It's just 10-times more horrific to hear the sound of the gunshots, to hear the murderer speak, and to hear her scream, it's absolutely nightmarish."

If you recognize the suspect's voice, please call the crime stoppers of Columbia County hotline at 386-754-7099.