Law & Order, Season 3

[Stone prosecutes a man who killed his wife to keep her from revealing that he was a concentration camp guard in World War II]

Steinmetz:
An SS officer, Heinrich, came to our door and gave us cake instead of bread. He said that if I could convince my neighbors to go along, nobody would be killed. People lived a few days, a few hours longer - that's what it was about. People who were not there could not possibly understand.

Stone:
Your wife understood, sir. That's why you killed her.