How should a 'know nothing' type of witness be prepared for trial testimony?

The best approach for preparing a 'know nothing' type of witness for trial testimony is to restrict them to discussing only what they know. This method ensures that the witness provides credible and reliable testimony based solely on their own experiences and observations, avoiding the potential for misinformation or speculation.

Witnesses categorized as 'know nothing' often lack direct knowledge about the case, so it is crucial to keep their responses grounded in what they can accurately recall. This approach helps maintain the integrity of their testimony and aids in creating a clear and truthful narrative for the court. By focusing on their personal knowledge, you minimize the risks associated with leading them to make assumptions or embellish details, which can undermine their credibility and negatively impact the case.

The other options may lead a witness to provide inaccurate, unverified, or overly detailed information that could distort their testimony and the overall case. Therefore, maintaining a focus on known facts is essential for preserving the quality and reliability of the witness's contributions.