turn state’s evidenceglossary / TURN STATE'S EVIDENCE turn state’s evidence, vb. To cooperate with prosecutors and testify against other criminal defendants (after hours of intense negotiations, the suspect accepted a plea bargain and agreed to turn state’s evidence). 词条贡献者 双语律师蓉婧,国内知名法学院民商法专业,擅长翻译各类与数据隐私及安全相关的法律文件。