Prisoner witnesses who are witnesses to events (as opposed to prison informers relaying admissions) require a Miletic warning directing careful scrutiny and identification of supporting evidence, not a Pollitt warning. Evidence of changed cross-examination tactics between trials has no probative value where the change reflects understandable forensic reasons, and if admitted, requires careful directions on permissible and impermissible uses. An Edwards consciousness of guilt direction must specifically identify each item of conduct to which it applies; the jury must not be left at large to apply the direction to unidentified matters.
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