Why would the proposed FBI building include a crematorium? You can really make people disappear.
What you just described (a Crematorium in the second basement of the FBI headquarters) sounds like from a movie made during the Cold War Era. Only thing missing may be the Trapdoors, the Painted Portraits with camera behind the eyes and those Revolving Walls that instantly change the appearance of a private room.
I’m laughing about it, but, with an unlimited budget, one just never knows.
ePsTiEn!!!!