Smithfield Police Chief Johnny McCoy did not immediately respond to a request for details on the development.
However, the chief told The Herald Journal that Keepers had abruptly resigned Tuesday night after being confronted with inconsistencies in his account of a purported May 25 incident where he claimed to have been shot at while talking on the phone at home.
An investigation revealed the four teens reportedly involved told police that they may have slapped the side of the truck, startling Keepers, but no shots were fired.
On Friday, Keepers said that in retrospect, he was unsure if a gunshot had been fired but he insisted the noise certainly sounded like one.
"It scared the daylights of me and my wife," he said.
McCoy said other inconsistencies in Keepers' account, including details about a traffic stop he had made in his second job as a Division of Natural Resources employee, developed in the week after the alleged incident.
Keepers confirmed that he also resigned his DNR job.