Which rule does not allow another officer to testify on behalf of another in court?

• A. Hearsay Rule
• B. Fellow Officer Rule
• C. Exclusionary Rule
• D. Best Evidence Rule

Answer: (B)

The key idea here is that testimony should come from what a witness personally observed. There is a rule known as the Fellow Officer Rule that prevents one officer from testifying in place of another or offering to vouch for another officer’s credibility. This rule protects the integrity of each officer’s own account, ensuring the jury hears from someone who witnessed the events firsthand rather than relying on a colleague’s secondhand assurance. The other rules address different evidentiary issues: hearsay governs statements outside the courtroom offered for truth; the Best Evidence Rule requires the original document to prove its contents; and the Exclusionary Rule bars evidence obtained unlawfully. None of those specifically govern an officer testifying on behalf of another, so the fellow officer rule is the correct emphasis in this scenario.