First time I've seen such a thing on Bitcointalk.  

There are several articles and documents on the official fda.gov website which include the contact information mentioned by the OP, so I assume the information is valid. Nevertheless, this doesn't mean the real dr. Wolfgang Kainz is the author of this post; therefore, it will be interesting to see what response (if any) NotATether and LoyceV get. It is very difficult to imagine how the FDA can possibly be involved with "tracing cyber criminals involved in cryptocurrency theft".