Hypothetical question. Let's say both Priti Patel and Jeremy Corbyn are judges. If you were innocent, who would you rather be tried by? What's the betting that, as an innocent person, you've got far more chance of being found guilty in a trial presided over by Patel than you have in one presided over by Corbyn? Does that translate in to Patel knowingly convicting innocent people? Not necessarily.
Here all the Judge does is act as a referee while the two sides try to convince a Jury of their narrative. As an innocent person you only need to be concerned about having a competent and effective defence team and an impartial Jury.
Most countries in Europe and Latin America don't have Juries. Instead they have a panel of three to five Judges and their verdicts must be unanimous to convict.
Your hypothetical question seems to involve Priti Patel and Jeremy Corbyn being judges in a system that doesn't exist.