Why did Christa Do it .... Spoilers
Before she was brought in I did not understand why she did not set him up or rat out Hempf. He would have had a hard time explaining himself to his bosses if word got out what his real motives were. He would have been a easy target with a recorder or camera. Did anyone else feel she may have been into him but just got caught up in more than she could handle. Was Hempf right about him being able to satisfy her.
On another note her boy friend felt after all those years she removed the typewriter herself, It was weird because why would she have killed herself if there was nothing there, It seemed She would have just been covering her tracks. Remember he did not know she was questioned and threatened.
If she was going to kill herself why would she have cooperated in the first place.