Clarksville police are trying to locate a man with an aggravated robbery warrant on file.
Howard Graves, Jr. is wanted for robbing a 31-year-old man on Ernest Shelton Drive on the morning of November 20.
Police said Graves, 46, struck the man in the head with the handgun, causing the victim to lose consciousness.
When the victim woke up a short time later, he realized $580 had been removed from his front pant pocket.
A witness gave police a tag number, which led to the identification of Graves.
He was additionally identified by the victim through a photo lineup.
Anyone with information on Graves or his whereabouts should call 911 or Clarksville police at 931-645-8477.