Queen’s evidence
noun/ˌkwiːnz ˈevɪdəns/
/ˌkwiːnz ˈevɪdəns/
[uncountable] (law)- (in the UK) if a criminal turns Queen’s evidence, they give evidence against the people who committed a crime with them
如果犯罪分子改变了女王的证据，他们就会提供对与他们一起犯罪的人不利的证据