Every piece of evidence the prosecution intends to present is in the brief to court ... available under disclosure law to the defense.
Both sides know, before the court sits, what evidence the prosecution intends to introduce and can file pre-trial motions to exclude evidence. The judge will rule on those motions for the reasons I laid out above.
That happens in EVERY single criminal trial from Article I Courts to Federal District Courts. There is nothing special about the Rittenhouse Trial except the media circus and the zeal that some had to make into a political show trial.
If Mr. Rittenhouse is ever before a court again ... I advise the prosecution to be ready to argue their case IN COURT and not depend on the media to secure a conviction.