What does it mean to prove guilt "beyond a reasonable doubt?" A prosecutor has to convince a judge or jury that a defendant is guilty "beyond a reasonable doubt." A defendant's most common defense is to argue that "there is" reasonable doubt; that the prosecutor has not built a sufficient case to prove that the defendant is guilty. The proof in criminal cases is provided by the prosecutor and the judge and jurors are supposed to resolve all doubts from the evidence. BACK TO FAQ © 2005. All rights reserved  | Developed by Aridel Technologies