... as well he should be for not sharing information that should be shared with the defense.

Making someone look bad when it is deserved and when it is not deserved are two very different circumstances.

I would hope that any attorney that acts without ethics should be investigated and removed. If the system is not good enough to self-police itself, then we have a problem.

Could he have instead gone to the state bar to raise his concerns? Is there an equivalent of a Dept of Internal Affairs that investigates prosecutorial misconduct?