I'm trying to remember a quote. I believe it was from someone involved in the Spanish Inquisition. The gist of it is saying that the inquisitor only needed a few words from a person on trial to contort them and find him guilty. It goes something like, "I can hang a man in seven words" or "hang a man in those lines." I google searched to no avail.
Cardinal Richelieu is supposed to have said, "if you give me six lines written by the hand of the most honest man, I will find something in them to hang him." The quote is apocryphal.
Probably a line often attributed to Cardinal Richelieu. As quoted in The Cyclopedia of Practical Quotations (1896) by Jehiel Hoyt, under "DISCERNMENT" (EDIT: p763, the book's organization is a little confusing):
Qu'on me donne six lignes écrites de la main du plus honnête homme, j'y trouverai de quoi le faire pendre.
which Hoyt translates as
If you give me six lines written by the hand of the most honest of men, I will find something in them which will hang him.
He doesn't provide a source, though, and I believe this attribution is disputed.