Can a judge tell the jury of old convictions?

In general, a judge can inform the jury about a defendant's prior convictions if they are relevant to the case, but this is typically limited to specific circumstances, such as when the defendant is testifying and their credibility is at issue. However, judges often exercise caution to prevent undue prejudice against the defendant, as older convictions may not accurately reflect current behavior. The rules governing this can vary by jurisdiction, so it's essential to consider local laws and court procedures. Ultimately, the judge's primary responsibility is to ensure a fair trial.