Study Sanhedrin folio 33A with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
From here it is derived that in cases of capital law, the court opens the deliberations by first raising a claim to acquit the accused. This baraita corresponds to the explanation of Abaya and Rava that the court notifies the accused that he has nothing to fear if he is innocent.
§ The Mishnah teaches that in cases of monetary law, the court brings the accused back to be judged again if new evidence arises, whether with a claim to exempt him or with a claim to find him liable. In cases of capital law, the court brings the accused back to be judged again with a claim to acqu
Rav Yosef says: This is not difficult. The Mishnah here, which teaches that the court does bring the accused back to be judged again if new evidence arises, is stated with regard to a judge who was an expert, whereas the Mishnah there in tractate Bekhorot, which teaches that what he did is done,
Rav Naḥman says a different explanation: The Mishnah here, which teaches that the court does bring the accused back to be judged again if new evidence arises, is stated with regard to a case where there is a court greater than this one in wisdom and number of students that can judge the case again.
Rav Sheshet says a different explanation: The Mishnah here, which teaches that the court does bring the accused back to be judged again if new evidence arises, is stated with regard to a case where the judge erred in a matter that appears in the Mishnah, i.e., he forgot an explicit mishnaic ruling