公诉证明需要证据支持,如果证据发生变化,造成证明力减弱甚至证明方向改变,必然破坏证据体系的完整和证据链条的闭合,从而达不到公诉证明标准和证明目的。因此,公诉证据变化是公诉证明过程中经常出现并严重影响公诉证明效力的一 Prosecution evidence requires evidence support, if the evidence changes, resulting in reduced or even prove the proof of change in direction, will inevitably undermine the integrity of the evidence system and the closure of the chain of evidence, so as not to meet the standard of proof of prosecution and certification purposes. Therefore, the change of prosecutorial evidence is often proved in the process of prosecutorial evidence and seriously affect the effectiveness of prosecutorial evidence