Not technically the "FBI" but any agency authorized to access low & high-tech tracking/facial recognition/data records which, again technically, crack the case. Pull out your phone and use any goog/apple app that utilizes "recognition".

For example- Google App. I run a thrift store, and to get comparables on most any item, I take a picture of said item and boom, item has a boatload of comparables with stunning accuracy (price/manufacturer/where its sold etc). Same with faces, just like AI on FB or any other social platform. Every time you walk into a Walmart, big box store, school, restaurant, bank, courthouse or any place with cameras you are being tracked.

FBI agents aren't all that... but their tech is. Same w any law enforcement agency, and, thankfully- the NSA, too