They're calling the man "John Doe 27." They think he could be involved in child exploitation or sexual abuse.
He has brown hair with graying sideburns and a bald spot. He wears glasses and a ring on his right hand.
The FBI also say a plaid chair might help someone recognize the suspect or victim.
Based on audio in the files, investigators say it appears as though he speaks with a southern accent and refers to himself as "Jimmy."
If you have any information about this suspect, call the FBI tip line at 1-800-CALL-FBI. You can also send tips on the FBI website.