Judges are human beings. They come with their own biases.

They are most often appointed by a Governor in a political process and are then rarely voted out thereafter.  Hubris?

There are liberal judges and there are conservative judges, particularly in criminal matters.  Those who have spent years primarily defending criminals have a much different viewpoint than those who have spent years primarily prosecuting them.

Those with no prior criminal experience whatsoever before becoming a judge develop a specific viewpoint over time.

I practiced in front of both Judge Carp and Judge Woodrich. as a prosecutor and as a defense attorney.  Based on that experience I agree that both had a tendency to put their thumb on the Defendant's side of the scale of justice beyond just the 'presumption of innocence'.  They were closer to being advocates instead of being impartial.

With no knowledge of specifics, it is impossible to make an independent evaluation but the DA doesn't do this lightly.