As I was in the German police for almost 10 years I recently found a support group for German, Austrian and Swiss TG police officers (https://www.facebook.com/interessengemeinschafttranssexuellepolizei)on Facebook.
Getting support from the Susan's members community (e.g. "likes" on Facebook, new connections to other TG officers outside GER/AUS/CH) would be much appreciated!
Btw:
There is another U.S. support group called "TCops International" and one in the U.K. called "National Trans Police Association". Both are on Facebook as well.