as with other stings where an FBI counterintel agent has been pretending to be an employee of a foreign government, probably he thought he was leaving material

as with other stings where an FBI counterintel agent has been pretending to be an employee of a foreign government, probably he thought he was leaving material at some super secret sneaky spycraft dead drop in WA DC for a non-official-cover employee of (russia, china, whatever) to pick up.