Greymalkin

"Il vaut mieux hasarder de sauver un coupable que de condamner un innocent."

"It is better to risk sparing a guilty person than to condemn an innocent one."
Zadig (1747)
Voltaire (François-Marie Arouet) (1694 – 1778)

"It is better that ten guilty persons escape, than that one innocent suffer."
Book IV: Of Public Wrongs, Chapter 27, Commentaries on the Laws of England (1765 – 1769)
Sir William Blackstone (1723 – 1780)

Often incorrectly credited to Daniel Webster (1782 – 1852) or Thomas Jefferson (1743 – 1826) who were most likely quoting Blackstone themselves, Blackstone himself most likely referencing Voltaire.