What is the guidance regarding belief of witnesses with IDD?

• A. Always believe
• B. Do not base belief solely on IDD
• C. Disbelieve all with IDD
• D. Only consider IDD status, disregard other facts

Answer: (B)

Believability should be judged on the content and context of the testimony, not on the witness’s developmental status. A person with IDD can provide reliable information just as any other witness, and IDD does not automatically make someone honest or unreliable. Evaluate credibility using standard criteria such as whether the account is coherent, detailed, and consistent with other known facts, and whether there is independent corroboration or observable opportunity to witness the events.

Also recognize and accommodate communication needs to ensure the witness can participate accurately: use plain language, ask non-leading questions, allow extra time, and consider a support person or advocate who can help the witness express themselves without influencing what they say. Ensure the interview environment is respectful and free from pressure, and document statements in the witness’s own words. By not basing belief solely on IDD, you weigh all relevant evidence fairly and accurately.