It's the job of the defense attorney to remind the jury of who has the burden of proof and what degree of proof is required for a verdict.

In his murder trial, the only thing that the defendant had going for him was that they never did find the body of his missing wife, but all the circumstantial evidence pointed to the husband. In his closing argument, at 5 minutes before the hour, the defense attorney stood before the jury and said "I have an announcement. We have a surprise witness. My client's wife will be walking through the courtroom doors at the hour." The jury was surprised and for the remaining time they were all gazing, transfixed at the courtroom door. When the time had passed, the defense lawyer told them "It may seem like a trick, but the mere fact that you were looking at the door and expecting to see the victim means that you do have reasonable doubts about whether my client commited murder, and with that doubt, you must find him not guilty. Thank you."

The jury was out for 10 minutes and found the lawyer's client guilty and sentenced him to life in prision. Dumbfounded, the lawyer later approached the jury foreman and asked how they found his client guilty. "Well, that was a pretty good argument you made, and we did have to admit we were looking at the door pretty good . . . except your client was the only one that wasn't looking at the door . . . "