The guy who started the modern version of tracking political enemies and other potential “trouble makers” was a guy named Reinhard Tristan Eugen Heydrich. I’ll leave it as an exercise for readers who’ve never heard of this individual to research him.
Reinhard Tristan Eugen Heydrich
The Czechs know (should say “knew”) him well. Especially those few who managed to survive Lidice reprisals following his “removal”. There being only women who survived Ravensbruck, and only 7 children who were germanized into SS families.
Richard Branigan played him rather well in “Conspiracy”
The intro to which is 6 mins long. Excellent, and chilling.
And only know this because one copy was rescued that the Russians missed in Berlin. Such is history.