I think a recent plan to move the FBI headquarters out of WDC was scrapped, supposedly because of costs of the building.
And, I believe the labs have already been relocated elsewhere.
DOJ needs to be where they are. But all of the other departments of the administration don’t have the same ties and should be considered for relocation to fly over country. The nation would be better off, for sure!!
The labs are in Quantico and have been for some time.