Research shows hypnosis increases confidence and detail reported without reliably improving accuracy, and can increase suggestibility.
It depends on the jurisdiction; some states exclude it, others allow it with safeguards, and rules have changed over time.
Yes. People can sincerely remember details that never happened, especially after suggestion, leading questions or information from others.
With care: they require corroboration, since suggestive techniques can create false memories, though some delayed recall is genuine.
Use open questions and free narrative, avoid sharing theories or suspect photographs and do not describe other witnesses' accounts.