What is 'vouching' and why is it objectionable?

What is 'vouching' and why is it objectionable?

• A. It is when a witness fully endorses the opposing party's evidence
• B. It occurs when a witness refuses to answer
• C. It is a permissible cross-examination tactic
• D. A witness or attorney states another witness's credibility; credibility is for the fact finder, not for a witness to assert

Answer: (D)

Vouching is when someone tries to guarantee a witness’s honesty by stating that the witness is credible or trustworthy. This is objectionable because it asks the jury to trust a witness based on someone else’s assurances rather than on the actual evidence and testimony. Credibility is for the fact finder to decide, not for a witness or attorney to declare. That’s why the correct description is a witness or attorney asserting another witness’s credibility, which improperly swears in a witness’ truthfulness. The other ideas don’t fit vouching as precisely: endorsing opposing evidence isn’t the same as asserting someone’s credibility, refusing to answer is a different issue, and claiming that a cross-examination tactic is permissible misses the fundamental problem of improperly swaying credibility judgments.

Vouching is when someone tries to guarantee a witness’s honesty by stating that the witness is credible or trustworthy. This is objectionable because it asks the jury to trust a witness based on someone else’s assurances rather than on the actual evidence and testimony. Credibility is for the fact finder to decide, not for a witness or attorney to declare. That’s why the correct description is a witness or attorney asserting another witness’s credibility, which improperly swears in a witness’ truthfulness.

The other ideas don’t fit vouching as precisely: endorsing opposing evidence isn’t the same as asserting someone’s credibility, refusing to answer is a different issue, and claiming that a cross-examination tactic is permissible misses the fundamental problem of improperly swaying credibility judgments.