Robert Lindon Tackett, 63, was last seen in Hot Springs, Arkansas, on May 26, 2016. He is described as 6 feet 3 inches, 145 pounds, with gray hair and blue eyes.

Tackett vanished in late spring 2016 with no clear explanation. There are no reported signs that he meant to leave, no evidence of a crime made public, and investigators say very little about the circumstances of his disappearance. The Hot Springs Police Department has handled the case, but leads have been scarce and the investigation has struggled for lack of information.

The key unanswered question remains what happened to him after he was last seen.