Evansville police were called to the White Castle restaurant on the city's far east side, after a report of a robbery.
An employee says that when she went outside to take out the trash, a man put a gun to her head.
She says the man told her that he'd already killed four people, and demanded she take him inside.
Investigators say the suspect then led her and a manager to the safe, where he took a "good amount" of cash.
Police say K-9s were unable to pick up a scent.
There are currently no suspects, but authorities tell us they are going through the restaurant's surveillance video for clues.
No one was injured during the robbery.
(This story was originally published on June 5, 2018)
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