state's evidence
noun [ U ] law US specialized uk/ˌsteɪts ˈev.ɪ.dəns/ us/ˌsteɪts ˈev.ə.dəns/
刑事被告向法院提供的对同案犯不利的证据（女王在位时则称为Queen's evidence）
evidence from someone who has been accused of committing a crime, given against the people who were accused with them, in order to have their own punishment reduced
Compare: Queen's evidence