Rule of law & due process, without which some legals who have not bothered to learn enough English would get taken out with the trash. I forget who said it, but one of the founders thought it better that a bunch of guilty men go free than one innocent be unjustly punished.
OK, it wasn’t a founder at all; it was a British judge whose reasoning carried on into our legal thinking.
(From Wiki)
In criminal law, Blackstone’s formulation is the principle that: “It is better that ten guilty persons escape than that one innocent suffer”,...as expressed by the English jurist William Blackstone in his seminal work, Commentaries on the Laws of England, published in the 1760s.