Since this list does not contain a FBI Office in Lafayette then, Lafayette being in Tippecanoe Co and Delphi being in Carroll Co, must fall under the jurisdiction of the Indianapolis Office because neither Carroll County nor Tippecanoe County are listed under the field offices. Why I was able to locate two FBI offices in Lafayette, will not be stated.
It may be significant when the FBI first arrived at the High Bridge CS. It seems they, or at least one field agent, arrived on the 13th but the FBI came full metal jacket, equipped for anything, on the 14th.
It would be highly unusual for multiple FBI Agents to show up on the 13th, since the girls weren't found yet so, they had no way of knowing they were searching for bodies possibly left by a SK or an abduction across state lines or otherwise.
The FBI would not know to assist DPH and ISP until Feb 14 at 12:15PM when the girls were discovered.
Can we verify FBI participated in the search on Feb 13? Sheriff Tobe announced at midnight that LE would be calling off their search until early the next morning.
If a SK was on their minds, it couldn't have entered into their conversations until after the two girls were discovered a few minutes after 12:00PM unless they accessed LGs cloud for the BG video and audio on the 13th which they could not legally do without a family member doing it for them. Otherwise, they would be required to obtain a SW for the data.