Why would they tacitly admit to performing warrantless searches?
A bureau spokesperson issued a statement: “I can confirm we conducted court-authorized activity at the address in Carmel today.
Believe everyone can put together the type of events that cause sudden behavior changes like that. (Hint: money offers or family threats)
I don't know what motivated this guy's disappearance but you don't get quietly fired, scrubbed from public association and have the FBI raid your apartment when you're a victim of abduction. We know some sort of federal crime took place to justify the raid so my guess is the guy is not an abductee but a fugitive.
I am not saying that definitely happened, but it's a narrative which more or less fits the facts.