1. The investigators organized Li and Xu to identify at the same time, which violated the individual identification rules.

2. The investigators organized three suspects to identify only the bills involved, which violated the mixed identification rule.

3. The investigators used verbal threats to identify Yang, which violated the law.

It is wrong for investigators to refuse to meet lawyers because there is no signature of Yang on the power of attorney. According to the regulations of the six departments, if a criminal suspect hires a lawyer at the investigation stage, he or her family can represent him or her.

5. In the court trial, Yang was found to be suspected of accepting bribes, and should be prosecuted by the procuratorate, not directly tried.

6. The indictment can only be a supplement and explanation to the indictment, and cannot exceed the charges set forth in the indictment.

7. The new evidence obtained by the presiding judge of the first instance after the recess was not used as evidence in the trial of this case, which violated the provision that the evidence must be verified by court investigation procedures such as court presentation, identification and cross-examination before it can be used as the basis for final decision.

8. The county people's court appointed Zhao, the president of the criminal court, as the presiding judge, and Mao and Miao, the people's jurors in the original trial, formed a collegiate bench to retry the case, which violated the provision that the people's court in the original trial should form a collegiate bench to hear the case sent back for retrial.