Walker may do this indirectly. Let the former targets sue the pants off the perpetrators. The Supreme Court opinion by Justice Prosser left little doubt that what Chisholm and his co-conspirators did was so far beyond the scope of their duties and color of law that they can be held individually liable. Also, it appears to be unethical conduct per se, and should result in loss of law license.
Walker stays above the fray and allegations of playing petty revenge politics.
I was sort of hoping someone interpret it as criminal activity under color of law, and jail them.