I will now explain the presumption of innocence and the people's burden of proof. The defendant has pleaded guilty to the charges. The fact that a criminal charge has been filed against the defendant is not evidence that the charge is true. You must not be biased against the defendant just because he has been arrested, charged with a crime, or brought to trial. A defendant in a criminal case is presumed to be innocent. This presumption requires that the people prove each element of a crime and special allegations beyond a reasonable doubt.
See the problem? "The defendant has pleaded guilty to the charges." Except, this was on the eve of trial. And there would be no trial if he had pleaded guilty. This seems like common sense. Except, as many lawyers have found out, jurors lack common sense.
After closing arguments, during deliberations, the jury sent the judge a note inquiring about the guilty plea. The judge tried to cure his error with remedial instructions and juror polls. But last week, the Ninth Circuit held that the judge's best efforts were not enough, and granted habeas relief to Bryant Keith Williams.