I can't help but wonder if they aren't looking into a potential catastrophic failure of a device resulting in serious injury or death to the user...
I hope that's not the case but still don't know why they'd waste the time and effort of going to a store to borrow the items. Maybe it is something local. I don't know how the FBI works but borrowing items doesn't seem to make any sense at all.
Who knows. Hopefully TS updates this thread if they bring the stuff back.