Implicit courtroom stereotypes are an urgent problem. When trial defendants are African American, as is disproportionately the case, they are vulnerable to implicit fact finder stereotypes that threaten the presumption of innocence: unconscious associations linking the defendants with violence, weaponry, hostility, aggression, immorality, and guilt. Implicit-social-cognition research reveals that one valuable tool in combating this threat is individuating information — information that, through methods such as defendant testimony, brings an individual to unique life. Yet courts frequently chill defendant testimony by permitting impeachment by prior conviction. Courts determining whether criminal defendants should be impeached by their prior...