I don't watch movies much those days, but whenever I watch a movie, I write the quotes I like the most from every movie I watch. Here goes a quote about finding a person who tells the truth or is lying.
When Martin Harris went to Jurgen the person who finds people, an old spy who worked for the Stasi, after telling his story, he asked him if he believes him, and this is how he answered him:
"In the Stasi, we had a basic principle: ask enough questions and a man who is lying will eventually change his story. But the man who tells the truth cannot change his, however unlikely his story sounds." -- Jurgen