Officials are calling it an unusual robbery at an unlikely place.
Kentucky State Police are investigating an armed robbery at an adult store in Knox County.
Wednesday afternoon, a man wearing a mask and carrying a gun came into the store demanding cash and asking for the store's supply of incense.
This incense is a synthetic form of marijuana and officials hope it will help lead them to the suspect.
“Someone is in this area will have a large amount of this incense or potpourri, may be out selling it in the community and we are asking anyone with information to contact us,” Trooper Shane Jacobs said.
The owner of the store is offering a reward for any information that leads to the arrest of the suspect.